A.总体处于淤积趋势B.冲淤速率明显下降C.累积冲淤量波动减少D.一直处于淤积趋势13.2002-2016年，黄河尾阁河道河床侵蚀、淤积的变化趋势是（A.持续淤积B.先淤积、后侵蚀C.持续侵蚀D,先侵蚀、后淤积读某地区图，回答下列14-15题。90正确效可14.图中M山地南、北两侧山麓地带的自然带()A.均为热带草原带B.北侧为热带雨林带，南侧为热带草原带℃均为热带荒漠带D,北侧为热带草原带，南侧为热带荒漠带15.M山地北侧山麓地带自然带的分布体现了()A从赤道到两极的地域分异规律B.山地的垂直地域分异规律C非地带性现象D.从沿海到内陆的地域分异规律下图示意大兴安岭中段东坡自山顶到山麓洪积扇的植被垂直分布，图中三类草原水分状况不同。据此完成16-17题。高度/四13O0针叶林网十林1500贮臣克x1200学华草原Ⅱ。学草原m900谷300501d01502d0之o300超/Km16.图中三类草原的水分条件山好到差依次为)A草原Ⅱ、草原I、草原IIB.草原Ⅱ、草原I、草原【第4页共8页

天津一中2022-2023-1高三年级语文学科第一次月老试卷第3页共4页第Ⅱ卷(111分)(2)携来有侣曾游。(《沁园春·长沙)三、（共27分）(3)用之如泥沙？(《阿房宫赋》)14.将下面的句子译为现代汉语。(？分)(1)文长以部下一诸生傲之，信心而行(3分)(4)寄蜉蝣于天地，(《赤壁赋》)(5)故木受绳则直，。(《劝学》)(2)好奇计，谈兵多中，视一世士无可当意者，然竟不偶(4分)四、(18分)阅读下面的文章，完成各题。路感15.徐文长诗歌特点形成的原因有哪些？(3分)村灵①行路难，普人常指边鄙僻远之区，而不知现代的通都大邑，行路更难，除非你是有车阶级，出门只靠步行，那么不但行人如纳，会增加紧张和疫劳：如果走得乏刀，双腿酸痛，寸步难移，你16.阅读下面这首词，按要求作答。(10分)绝对找不到一个立锥之地，让你歇一歌腿，缓一口气。大都市中公共交道之拥挤，令人望而却步。鹊桥仙陆游满眼摩天大接，马路宽广整洁，但你休想找个“民亦劳止，汔可小休”的机会。你不惜攻费怪桑，走进咖啡馆去，买个片刻安闲，那却又是另一回事了。华灯纵博，雕鞍驰射，准记当年豪举？酒徒一一取封侯，独去作江边渔父。轻舟八尺，低篷三扇，占断⑦蒴洲烟雨。镜海元自属闲人，又何必君恩赐与！②在故乡，村庄市镶之间，只要相隔三五里，中途大概有一两个路亭，专供行人憩坐。路亭建【注】①博，古代的一种棋戏。②占断：占尽。③镜湖：鉴湖，在今浙江绍兴。唐天宝初，贺知筑简陋，地位常据着往未的通路，人小才如斗室。也许是四根石柱，四角顶，四面通风，犹如在中章谙求回家乡会稽当道士，玄宗诏赐他镜淘一角。国画里常见的茅亭，雅有古意，不过顶上盖的是灰色的瓦片。也许和农家近似，长方形，但三面砌(1)下列对这首诗的理解和分析，不正确的一项是（)(3分)墙，一面临空，当路的两壁开肴无门的门框，设备州大体一样，靠壁笨石作瓷：不谦简授，请君稍A.开篇“华灯纵博”三句追忆往事，发表感概。前两句重现了当年词人与同僚级情博弈、策马射。猎的场景。③别看它破陋寒伧，貌不惊人，在长途泼莎的劳人心里，这却是沙漠中的一掬清泉，人生道上B.“酒徒”两句中，一个“独”字突显出词人归隐的释然自安和恬然自得，词人的潇洒豁达跃然的一个站驿。纸上。④赶市的村夫农妇，或者把着辛苦经营的菜豆瓜果、鱼米柴草到街上求售：或者提篮挑筐，到C.“占断”一句，极烟水迷离之致，尽逍遥容与之意，诗情画意，境界全出，充分体现了词人用街上去买办日用杂物、农事工具：或考因为借贷无门，挟些不值线的衣物破烂上当铺去质钱…每笔盔蓄的特点。天清早，朝阳初凳田野，便沐晨风，带晓雾，从村里出发，哼哼卿唧，形成行列，快步赶上镇去，D,词中“谁记”、“独去”、“占断”、“元自”，“何必”等词语，层层转折，步步蓄势，在直要到事毕功成，事倍功半，或者事改功亏，才循原路起回村旦。表现感情方面起了重要作用。⑤奔波忙碌了半天，人是倦了：而“不如意事常八九”，来兴而去，常常败兴而归。心情懊丧，(2)上阕怎样运用对比于法勾勒诗人形象的？请简要分析。(4分)双脚沉重，生理和心理的倦怠形成双倍的压力。幸而半路有个路亭，排朗迎人，容他们且驻为住，使身心暂时有个着落。吹一阵凉风，扯一阵闲话：再闲闲地抽一筒旱烟，让生命获得片叶的苏息，好再鼓起勇气，维续上路。不巧遇上意外的天气变幻，更可以在路亭里求得荫庇，聊避风雨。试想(3)结合对全词的理解，赏析“镜湖元自属闲人，又何必君恩赐与！”两句的妙处。(3分)这对疲倦的旅人，是何笔温煦的抚慰！⑥路亭所处的位置，不但富于实用价值，又多似高明的画后布局，引人八胜。有的点缀田畴广野中间，“前不把对，后不着店”，亭亭玉立，不但使无垠的原减少单调之感，还便于旅途修长的过客及时小驻：更可以接待天崖沦落的流浪人，无处投宿时借此歇夜；对田头劳作的农民，这叉是17.补写出下列句子中的空缺的部分。(7分)(1)在孔子看来，“仁”是“礼”的内在依据，“礼”是“仁”的外在表现。所以他说“天然的耕余休息之地，日中时刻，可以静坐进餐，冬避朔风，夏避炎阳。有的高踞岭背，峰回路转、(《论语·颜渊》)，二者是紧密结合的。同时，他认为“礼”在国家治理中有重要地位。在《侍坐》两村交界之处，翼然一亭，挺秀如画。山行较地荧力，行人跑到岭上，大都气息咻咻，汗流夹背，在路亭的石条凳上坐憩片刻，听山风苏苏从树梢掠过，投下一身清凉。有的筑在河滨，面临盈盈的中他嗤笑子路是因为子路：“流水，傍着蔼漓的绿荫，便利行人随意歌脚，等待摆渡或过往的船只…

高三第一轮复周测卷·数学（二）23G3ZCJ(新高考)数学-R-必考=FJ·A【解题分析】由题设可得(a一1)2一4≤0，解得一1≤a≤3，故实数a的取值范围是[-1,3].【答案】[-1,3

作文等级评分标准(60分)一等二等三等四等作文等级(20-16分)(15-11分)(10-6分)(5-0分)内符合题意符合题意基本符合题意偏离题意中心突出中心明确中心基本明确中心不明确20内容充实内容较充实内容单薄没有什么内容基思想健康思想健康思想基本健康思想不健康础感情真挚感情真实感情基本真实感情虚假等级表符合文体要求结构严谨符合文体要求基本符合文体要求不符合文体要求结构完整语言基本通顺结构混乱20结构完整语言通顺结构基本完整语言不通顺，语病多语言流畅字迹工整字迹清楚字迹清楚字迹潦草难辨发特深刻较深刻略显深刻个别语句有深意展征丰富较丰富略显丰富个别例子较好等20有文采较有文采略有文采个别语句较精彩级分有创意较有创意略有创意个别地方有新意说明：1.基础等级评分，“题意”项主要看选择角度是否符合材料内容及含意涉及的范围。选择角度符合材料内容及含意范围的属于“符合题意”。与材料内容及含意范围沾边的套作，在第三等及以下评分(“发展等级”不给分)。2.发展等级评分，不求全面，可根据“特征”4项16点中若干突出点按等评分。(1)深刻：①透过现象深入本质；②揭示事物内在关系；③观点具有启发作用。(2)丰富：④材料丰富；⑤论据充实；⑥形象丰满；⑦意境深远。(3)有文采：⑧用语贴切；⑨句式灵活；①善于运用修辞手法；①文句有表现力。(4)有创意：②见解新颖；⑧材料新鲜；④构思新巧；⑤推理想象有独到之处；⑥有个性色彩。3.缺标题扣2分；不足字数，每少50字扣1分；每1个错别字扣1分，重复的不计；标点错误多的，酌情扣分。文言文参考译文：孔子说：“有道德的人是不会孤单的，一定有志同道合的人来和他相伴。”施予德泽的人崇尚不求回报，承受德泽的人崇尚必求报答。因此，大臣勤勉劳苦来为君主效力而不贪求君主的赏赐，君主掌控施恩来驾驭臣下而不求回报，所以《易经》上说：“当政者使民勤劳而民无埋怨，对国家立了大功，但不认为自己应该得到别人的感激、赞扬，这是敦厚之至的表现。”赵襄子被包围在晋阳，战争结束、包围撤去后，奖赏五位有功之臣，高赫没有功劳却受到上等的赏赐，五位有功之臣都很愤怒。张孟谈对赵襄子说：“晋阳之役，高赫没有建立大的功劳，现在您却给予他上等的赏赐，这是为什么呢？”赵襄子说：“当我受困遭难时，不偏离（恪守）君臣之礼的只有高赫一人。你们虽然建立了功劳，却很骄纵放任，我给高赫上等的赏赐，不也是应当的吗？”孔子听闻此事后说：“赵襄子可以说是善于奖赏士人的君主啊！奖赏（高赫）一人，而使全天下做臣子的，没有谁敢有违君臣的礼数。”楚王、魏王在晋阳会盟，打算攻打齐国，齐王忧虑这件事，派人召来淳于髡并对他说：“楚、魏两国合谋，想要攻打我们齐国。希望先生与我一起分担其忧。”淳于髡听后大笑而没有回应，过了会儿，齐王再次问他，淳于髡又一次大笑而不应，第三次问他还是没有回应，齐王脸上现出愤怒之色，对他说：“先生拿我的国家当儿戏吗？”淳于髡回答说：“我不敢拿大王的国家当儿戏，我笑我的邻居用一盒饭和一条鲋鱼祭祀田神。他祷告说：‘地势低注、容易积水的劣田，（让我）收获百车谷子，高地也适宜种植庄稼。’我笑话他用来祭祀的供品少而希求的东西多啊。”齐王说：“你讲得好。”赏赐淳于髡一千金、一百辆兵车，确立他为上卿。阳虎在卫国获罪，向北朝见赵简子，说：“从今往后，我不再培养人了。”赵简子问他说：“这是为什么呢？”阳虎回答说：“朝堂的人，我所培养的超过半数了。如今这些人却亲自在国君面前排斥我。”赵简子说：“只有贤能的人能够做到知恩图报，品行不正的是不会知恩图报的。种植桃树与李树的人，夏天能够在树下休息，秋天能够收获果实；栽种蒺藜的人，夏天无法在其下休息，秋天也只能收获其刺。如今，先生所培植的，都是蒺藜啊，从今往后，先生选对人再加以培养，不要等到已经栽种了再去挑选合适的。”齐国都城东门有个人曾经富贵一时，而后以行乞为生，有人问他说：“先生为何沦落到如此地步？”这人回答说：“我自己知道我曾任国相六七年，却未曾举荐一个人，我曾经两次拥有三千万的财富，却从未使（帮助）一个人致富，我也不懂得七人品行的优劣”孔子说：“万物难以区处无论大小多少各有其值得怨恨憎恶的地方，这是它们的命数人们如果了解了这一点，就在于他们善于外假于物了。”99语文答案第4页（共4页）

3.造成图示人户分离现象的根本原因是A.区域经济发展不衡B.生态环境区域差异较大C.人口政策的区域差异D.传统思想观念根深蒂固4.2020年以后我国人户分离人口增多，可能导致A.人口资源优化配置效应减弱B.城市教育资源压力减小C.农村老龄化现象日渐严重D.人口空间分布趋于均匀民居的屋顶是民居的重要组成部分，民居屋顶的外在形式是区域自然环境要素和人文环境要素相互作用的结果。我国南方地区气候温和，降水较多，南方民居屋顶被设计为坡度较大的斜顶，屋顶的外房檐突出延伸明显。图3为我国南方地区斜坡屋顶景观图。据此完成5~6题。5.南方民居屋顶多采用斜坡设计的主要目的是A.利于屋内保暖B.便于通风散热C.增加受光面积D.便于雨季排水图36.南方民居屋顶房檐较长，有利于A.春季减轻风沙影响B.夏季减少雨水溅淋C.秋季便于室内通风D.冬季提高室内温度城市各功能区在空间布局上不合理，会对城市的整体生态环境和人类的生产、生活产生很大的影响。华北某中学的小明在对家乡进行调研时，发现家乡的功能区在布局上存在很多问题。图4为小明家乡的功能区的空间布局图，箭头表示河流流向，该城市夏季盛行东南风，冬季盛行西北风。据此完成7~8题。N图例入河流大型超市一铁路。高级住宅区③曲一公路今钢铁厂○印染厂图47.下列有关图示各功能区的叙述，正确的是A.①功能区人口数量昼夜变化小液为瑞图B.②功能区分化并呈背向发展【高一地理第2页（共6页）】·23-350A·

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29.What does the underlined word "deter"in paragraph 2 mean?conversation partner liked them.On average,participants liked their conversationA.Harm.B.Inspire.C.Stop.D.Protect.partner more than they assumed their conversation partner liked them.Logically,30.What characteristics are common in musicians?this can't be true-pointing to the existence of a"liking gap".A.Strong-minded and generous.B.Perseverant and independentIn another experiment,participants reflected on the conversations they'd justC.Enthusiastic and responsible.D.Determined and selflesshad.Most of them believed that their partner had more negative thoughts about31.What's the text mainly about?them than they really did.A.Why premedical students are good at music."They seem to be too wrapped up in their own worries about what they shouldB.Why a musical background is crucial in medicine.say or did say to see signals of others'liking for them,says Clark."In view ofC.How medical students possess a musical background.people's vast optimism in other ways,people's pessimism about their conversationsD.How a musical background helps premedical students.is surprising.”DSo next time you meet someone new.and feel like you fluffed (theHave you ever been introduced to someone and walked away from the interac-introduction,don't write it off as a failure.Chances are that they like you muchtion cursing (yourself?If you're not in the right headspace,meeting newmore than you thinkpeople can make you produce anxiety,and it's all too easy to convince yourself that32.Why should we be kinder to ourselves when meeting someone new?you made a terrible first impression.A.People often like strange people more.But according to the new research,we should all be kinder to ourselves-B.Others generally overlook our mistakes.because we generally make a better first impression than we think.PsychologistsC.It's the requirement of the new research.from the universities in the US have found that after we have conversations withD.We actually perform better than we think.new people,they generally like us and enjoy our company more than we assume,33.How is paragraph 3 developed?which is the so-called liking gap.A.By listing statistics.B.By giving a definition.What is a liking gap?The liking gap is the difference between what peopleC.By giving an example.D.By making comparisonsreally think of us and what we think they think of us.The researchers said that it34.What do both of the experiments show us?can hold us back from developing positive new relationshipsA.The liking gap does exist.A team of psychologists researched on five different aspects of the liking gap.B.People tend to hope for the best.In one experiment,they asked participants who had never met before to have aC.Participants don't trust their partner.five-minute chat.The participants then filled out a questionnaire about how muchD.People are usually influenced by their partner.they liked their conversation partner,and how much they thought their英语第9页（共16页）新高考·押题卷英语第10页（共16页）新高考·押题卷

20.阅读材料，完成下列要求。(12分)材料公心共，服城心长吸水为技藏次园数，二(代)，无食空蝶分刻照、社会解读史料，获得历史认识，探寻史料表象背后的意蔬，是历史学的魅力所在。图2为1973制度成年支无毯四巧发无在全瑰达行外江格名中的出人8麦的封1973一1995年美元、德围马克、日元在全球央行外汇储备中的比重(%8070,而且60美元,在同50水专圆中每40林，赖车城30教训》20德国马克二料线元民主19731975以茶弃齐1980198541990作1995(年)奥，”突位杀学图2员等:学一摘编自[美]杰弗里·弗兰克尔《人民币国际化：历史经验（下）》通讯阐述从上述材料中发现的历史现象，并得出一个结论。（要求：现象源自材料，结论明确，史华苏论结合，表述清晰。)卡长》的思华自能确了父)点的端会香民木常时分吉国干，臀银公，一米划景地(，军背帕以同不殿海形台桥时园未部环外古国中这个这位，果层家合卖关二一择日第野((8)践》和其页8历史（二月第8页（共8页）宁名校联盟押题卷

19.(12分)如图，在圆锥P0中，AB是底面圆的直径，PA=AB=2,C是底面圆周上一点，PC与面PAB所成的角为30°，点M,N分别在PB,PC上，且PB⊥面AMN0荒终2求面N与￥国P4G灾角的余弦值号有最20.(12分)2022年河南、陕西、山西、四川、云南、宁夏、青海、内蒙古8省区公布新高考改革方案，这8省区的新高中生不再实行文理分科，今后将采用“3+1+2”高考模式.“3+1+2”高考模式是指考生总成绩由全国统一高考的语文、数学、外语3个科目成绩和考生选择的3科普通高中学业水选择性考试科目成绩组成，满分为750分.“3”是三门主科，分别是语文、数学、外语，这三门科目是必选的；“1”指的是要在物理、历史里选一门，按原始分计入成绩；“2”指考生要在生物学、化学、思想政治、地理4门中选择2门，但是这几右支门科目不以原始分计入成绩，而是等级赋分2(1)若按照“3+1+2”模式选科，求选出的六科中含有“语文，数学，外语历,地理”的由线C概率；(2)某教育部门为了调查学生语数外三科成绩与选科之间的关系，现从当地不同层次的学校中抽取高一学生4000名参加语数外的网络测试，满分450分，并给前640名颁发荣誉证书，假设该次网络测试成绩服从正态分布。①考生甲得知他的成绩为260分，考试后不久了解到如下情况：“此次测试均成绩为210分，290分以上共有91人”，问甲能否获得荣誉证书，请说明理由；②考生丙得知他的实际成绩为425分，而考生乙告诉考生丙：“这次测试均成绩为240分，360分以上共有91人”，请结合统计学知识帮助丙同学辨别乙同学信息的真伪附：P(u-o≤X≤+o)≈0.6827，P(u-2σ2)上，直线交椭图C于P.0点，直线AP,AQ的斜率之和为0.(1)求直线1的斜率；(2)求△APQ面积的最大值，22分把划函：-ax(1)若f(x)s-1,求实数a的取值范围；U,0)12(2)若x)有2个不同的零点x,x(x,<),求证：2x+3号>5a数学试题A第4页（共4页）

英语13.Where are the speakers probably?A.In a store.B.In a garden.C.In a temple.(120分钟150分)14.Who was this area built for?A.The citizens.选择题（共100分）B.The emperorC.The tourists.第I卷15.What color are most of the fish?第一部分：听力（共两节，满分30分）A.Gold.B.Black.C.Purple.第-节（共5小题：每小题1.5分，满分7.5分）16.What will the speakers do next?听下面5段对话，每段对话后有一个小题，从题中所给的A,B.C三个选项中选出最佳选项A.Walk around the pool.B.Go to the building.C.See the waterfalls听完每段对话后，你都有10秒钟的时间来回答有关小题和阅读下一小题。每段对话仅读一遍。听下面一段独白，回答第17至第20四个小题。1.Where does this conversation take place?17.Why didn't the speaker want a smartphone at first?A.In a classroom.B.In a hospital.C.In a museum.A.Because of its unnecessary features.2.What does Jack want to do?B.Because of its appearance.A.Take fitness classes.B.Buy a pair of gym shoes.C.Change his work scheduleC.Because of the cost.3.What are the speakers talking about?18.What does the speaker like to do with her smartphone?A.What to drink.B.Where to meet.C.When to leave.A.Chat with her friends.B.Check a map.C.Download apps.4.What is the relationship between the speakers?19.What does the speaker like most about her smartphone?A.CollegesB.Classmates.C.Strangers.A.The improved sound.B.Different apps.C.The entertainment online.5.Why is Emily mentioned in the conversation?20.What can we learn at the end of the talk?A.She might want a ticket.B.She is looking for the man.C.She has an extra ticket.A.The speaker dropped her new phone a lot.第二节（共15小题；每小题1.5分，满分22.5分）B.The speaker paid $100 to repair her new phone听下面5段对话或独白。每段对话或独白后有几个小题，从题中所给的A,B、C三个选项中C.The speaker's old phone often broke down.选出最佳选项。听每段对话或独白前，你将有时间阅读各个小题，每小题5秒钟；听完后，各小题第二部分：阅读理解（共两节，满分40分）将给出5秒钟的作答时间。每段对话或独白读两遍。第一节（共15小题；每小题2分，满分30分）听下面一段对话，回答第6和第7两个小题！阅读下列短文，从每题所给的四个选项(A,B,C和D)中，选出最佳选项，并在答题卡上将该项涂黑6.What is the man doing?A.Booking a room.B.Making a complaint.C.Asking for directions.The Whistler Blackcomb Snow School is regarded as one of the best ski schools in North America.7.What does the woman like best about their room?Our programs offer the best possible opportunity to improve skiing and gain confidence,skip lift linesA.The soft bed.B.The large bathroomC.The good view.and discover the wonders of Whistler Blackcomb.We have professional instructors from around the听下面一段对话，回答第8和第9两个小题world to help you in your language,ability and style.Explore and book your program online now!TEEN LESSONS8.When is the man's flight leaving?C.Next SundayRIDE TRIBE FIVE-DAY PROGRAMA.Next Friday.B.Next Saturday.9.How much will the man have to pay for all tickets?BENEFITSB.$1,160.C.$1,740Hang out with those of similar age and ability.A.$580.听下面一段对话，回答第10至第12三个小题。A luncheon voucher(午餐代用券)in mountain restaurants is included.10.Where does Amanda want to spend her summer holiday?One instructor to every six kids or less.A.In Beijing.B.In LondonC.In New York.PRICINGRegular SeasonRegular SeasonHoliday SeasonHoliday Season9911.What does Amanda's mother want her to do?7 Days in advanceWithin 6 Days7 Days in advanceWithin 6 DaysA.Learn about Chinese culture.$775$820$825$870LessonB.Look after her grandmotherLeason and Lift$1055$1100$1105$1150C.Offer some help on the farm冲刺押题卷一·S2英语第1页（共8页）冲刺押题卷一·S2英语第2页（共8页）1105

3.一个长方体共一个顶点的三条棱长分别是1，√2，√6，这个长方体的八个顶点都在同一个球面上，则这个球的体积为A.4元.2c.√2πD.3π33

晚上9：006.1K/s8.l同⑧【数学·参考谷案第1页共4贝丁23-CZ131c由表可知，共有6种等可能的结果，其中恰好是1名男生和1名女生的结果有4种，214是名男生和1名女生)=告-号.…8分20.解证明.,∠ACB=∠ADC=90°，∠A=∠A∴.△ACD∽△ABC,福把AC=AB…AD.…2分同理△BCDP△BAC,可得BC=BD·AB,∴.AC+BC=AB·AD+BD·AB=AB·(AD+BD)=AB2即AC十BC=AB2.…4分(2)设小正方形的边长为x,则AB=b十x=10十x,BC=a十x=3十x,AC=b+a=10+3=13,AC=BC+AB,.132=(10十x)2+(3+x)2,解得01=2，x2=-15(舍去)，.长方形的面积=(a十x)(b十x)=(3十2)X(10十2)=60.……8分21.解：如图，过点D作DH⊥AF于点H由题意，得∠DEH=53°，∠DFH=45°，EF=2.2m,…1分在Rt△DFH中，∠DFH=45°，..DH=FH.…2分设DH=xm,则EH=(x-2.2)m,在Rt△DEH中，∠DEH=53°，4…4分解得x≈8.8.经检验，x=8.8是分式方程的解。7分答：灯管D距地面AF的高度约为8.8m.…8分22.解：(1)证明：图1中D,E是AC,BC的中点，CD-AC.CE-BC.AC=BC,∴.CD=CE.,∠DCE=∠ACB=90°，∴.∠ACD=∠BCE.在△ACD和△BCE中，,AC=BC,∠ACD=∠BCE,CD=CE∴.△ACD≌△BCE(SAS),AD=BE。…3分如图1，延长BE,交AD于点F,交AC于点G,△ACD≌△BCE,∴.∠DAC=∠CBG.,∠CBG+∠CGB=90°，∠AGF=∠CGB,∴.∠AGF+∠DAC=90°，∴.∠AFG=90°，.BF⊥AD,即BELAD.…5分(2)四边形CDFE是正方形.……6分理由：CE⊥BE,∴.∠FEC=90°.由(1)知，BF⊥AD,【数学·参考答案第2页（共4页）】·23-CZ131c·∴.∠EFD=90°.,∠DCE=90°，∴.∠DCE=∠CEF=∠EFD=90°，∴四边形DCEF是矩形.DC=CE,四边形CDFE是正方形.…9分3)号13分提示：如图2，由(1)知，BE=AD,BE⊥AD,∴S动形B=今BE·AD=BE,当BE最大时，S边形B最大，由△BCE的两边之和大于第三边可知，当点B,C,E在同一条直线上时，BE最大，此时BE=BC+CE=2+1=3,S边形大雀=之X3=号图2

deDunes rarely cc therwn,but instedosmethingvingdune fieldshTheovewwith wind and water lowpa-and smaller dunes are known tofaster than argene But how the dunes interactthallyone another has been the topic of debate.CS,There are different theories,"explains Karol Bacik,the first author of the paper."eis that dunes of different sizes will collide ()and keep colliding,until they form onelarge dune,although this hasn't yet been observed in nature."Another theory is that dunescollide and exchange mass until they are the same size and move at the same speed.Led by Nathalie Vriend of Cambridge University,the researchers built a water-filled瑞round flume (where two small sand dunes could move around.The little dunes,thoughthey were the same size and shape,didn't move together at the same speed,which surprised些the researchers.Instead,the dunes moved away from each other as if they didn't like eachother.Finally,once the dunes had reached the opposite sides of the flume,they formed a$balance.Large piles of sand could threaten coastlines and buildings,the researchers say,and beingable to predict dunes'movement could help reduce some of the damage.But in a more immedi-ate sense,the experiment showed how dunes express their need for space,without making a sound.32.What can we know about sand dunes?熘A.They usually run on their own.odw snovs 1o1 a novo otsldsointen2R.Thoy tend to form a beautiful scene.够C.They can affect the local weather badly.46927D.They can make sounds to communicate.t四n0gynl霄33.What is Karol Bacik talking about in the third paragraph?A.Two theories about dunes'size.B.Two explanations on how dunes form.C.The possible rules of dunes'movements.D.Two research-based theories about dunes.全国100所名校最新高考模拟示范卷第6页（共12页）【22·（新高考）ZX·MN·英语（三）·G DONG】

第IⅡ卷限时强化练（4)一、语法填空1.a2.carrying3.Congratulations4.accomplished5.attempted6.marks7.its8.which:6w的萌国料其、心9.importantly10.in←材、二、短文改错1.say-→saying的、2.sincere→sincerelyo1的g.03.where→which数养中，4.have→has6石05.interesting-interest6.he→you69i0。ib9i9.b99wB7.Beside-→Besidesi05sn0598.convenience->convenient9

全国10所名校最新高考模纵示地8teDear Jack,AtibownothinTommthat?”注意：12west of theist 57ge Site inBeishan,Yours sincerely,Li Huaoto are第二节（满分25分）阅读下面材料，根据其内容和所给段落开头语续写两段，使之构成一篇完整的短文。ersityoAlyssa is excited for her first day of school.Summer is fun,but she always likes it when62school starts again in September.There will probably be new kids in her class.Alyssa likes63making new friends.Alyssa thinks a lot about what she wants to wear on the first day offucian-school.Her mom and dad say first impressions are important,so Alyssa wants to look nice.on eve-Alyssa and her mom go to the department store to get her new clothes.They walk pastthe boys'section,.Alyssa sees a bow tie(蝴蝶结领结).It has blue and pink stripes,.and iseritagearound the neck.Alyssa likes it.No,she loves it!uring"Mom,may I have that?"Alyssa says,pointing to the bow tie.“But that's for boys,”Alyssa's mom says.“Why?”Alyssa asks.“It's a bow..And it's pretty.”“Wel.”Alyssa's mom says,“OK,I guess we can get it..”They pick up the b文网On the morning of the first day of school,Alyssa is very excited.She hardyher breakfast,ven houh her dad has made waffles.Her dad shows her hooitie.It's harder than tying shoes!Alysa'sdad walks her to the bus stop.When they get there,Alyfriendwaiting there already with her mom.“Aveed!”Alyssaays..She's happy to see her friend.Y英语卷（一）第1页（共12页）【23·(新高考Zx·N~英语·

In 1946,a huge machine,7.known (know)as theworld's first computer,was born.阅During the Cold War,a "huge network"of学美在报社computers 8.was proposed(propose)by twoEARNING ENGLISE任务American scientists.By the end of the 1960s,somemini-networks were established.In 1990,TimBerners-Lee invented the World Wide Web,which新课程高二(B)第54期enabled computers all over the world同步课堂9.to communicate (communicate)with each other.Unit 12.Thanks 10.tothe pioneers of the the 20th(选择性必修)Book4century,the quality of human life has been greatlyimproved.【.阅读课本第52-53页的文章，完成以下图表。I,根据括号内的英文释义填写单词的适当形式：Inventor:Albert Einstein阅Inventor:Alexander FlemingProcess:In 1905,he was rocking hisProcess:In 1929.he saw 3.随1.Chang'e-5 has reportedly encouragedpaby when hewas suddenly inspiredSubsequently,“E=mc”was bornthe dish around which the bacteria hadtechnological innovation (n.the introductionwhich showed how a small piece ofbeen destroyed.It was the 4.of new ideas or methods)and achieved a series任务mass could produce lof penicillin.A few years later,penicillinSignificance:Einstein showed no练of key breakthroughs that will greatlytime,mass or length are 2was being mass-produced.change according to our experience ofSignificance:It can help to cure peoplefacilitate future lunar and interstellar missions.them.and save the lives of millions2.So far,the books and computers donated (v.1.an unbelievable amount of energyto give sth to a person or an organization in2.constantorder to help them)by several companies have3.a blue mouldbeen sent to high schools in the countryside.4.natural formInventor:Eckert and MauchlyInventor:Two American scientists andPurpose:To improve the accTim Berners-Leeof the US Navy's missilesPurpose:To get more things done efficiently3.The Canadian police plan to launch_(v.to startProcess:In 1946,they producedProcess:During the Cold War,two Americansth,usually sth big or important)an investigationwhich wastheworld'sscientists proposed a"8.读任务computers.into the deal.About the machine:It measured 100By the end of the 1960s some 9feet long by over 10 feet high andwere established,but only a few computers练4.On entering his house,we at once perceived (v.to become aware of)that his house had beenweighed over 30,000 kilogramscould connect to them.It had 18,000 tubes,thousands of1990,Tim Berners-Leetastefully decorated.circuits and 6,000 switches and itenabling computers all over5.It has been proposed (v.to suggest sth as a planthe world to communicate with each other.or course of action)that more computers should5.a huge machine8.huge networkbe bought for the students in the new school year.6.first computer9.mini-networks7.a great deal of energy10.the World Wide WebⅡ.以下为课本第52-53页文章的缩写，请认真阅Ⅱ.用括号内所给单词的适当形式填空。读，并在空白处填入1个适当的单词或括号内单词的正确形式。1.Though Alice wasn't a gifted (gift)athlete,读Here are some pioneers in different fields of theher extra training paid off eventually,and shebroke the world record for the high jump.20th century.One of the 20th century's premier scientists练2.No matter how boring it is now,education will务was Albert Einstein.In 1905,he 1.was rockinghelp you become a productive (produce)(rock)his baby when he was suddenly inspired.member in society.2.Subsequently (subsequent),"E=mc2"came into3.The advanced robot can sort through garbagebeing.It showed how a small piece of mass couldwith a surprising degree of accuracy(accurate),produce 3.anunbelievable amount ofwhich will significantly reduce operating costsand improve efficiencyenergyIn 1929,another important finding was made bybiologist Alexander Fleming.He found the阅4.natural (nature)form of penicillin by chance,4.If you don't get a good sleep at night,you may5.which Fleming perceived could be used to killnot feel energetic or study efficiently (efficient)bacteria.Several years later,penicillin was beingduring the day time任务mass-produced and helping to save the lives of练5.As the interviewer,you have to make anmillions.evaluation_(evaluate)of abstract qualities thatDuring World WarⅡ，to look for ways ofcan't be found on a resume.improving the 6.accuracy (accurate)of theirmissiles,the US Navy turned to Eckert andMauchly to deal with the problem and produce amachine to do the job in a joint effort.

0.What does the speaker say abou posting kids'embarasn pictures?A.It's dangerous.B.It's entertaining.C.It's inappropriate.第二部分阅读（共两节，满分50分）第一节（共15小题；每小题2.5分，满分37.5分）阅读下列短文，从每题所给的四个选项(A、B、C和D)中，选出最佳选项，并在答题卡上将该项涂黑。AYou're unique and your mental health support is,too.Whether you want to work on your own,with a peer or a doctor-or any combination of the three-Health&Wellness is here for you.Weprovide a range of health services for your physical and mental health to help support you in achievingyour personal and academic goals.You'll find lots of ways to access mental health support oncampus.Self-guided supportMySSP offers free,real-time and/or appointment-based private,24-hour support for any concern.You can call or chat with a counsellor directly from your phone wherever you are in up to 146 differentlanguages.Peer supportFind support from trained students who have had experiences and concerns similar to yours andunderstand what you're going through.At Health &Wellness Peer Support Service,you'll discussthings like goal setting,role-playing and more.WorkshopsLearn new skills that help maintain or improve your health,or build on the skills you alreadyhave.Workshops can help you meet up with students who may be feeling the same way and find thehelp you need to succeed.Some workshops have scheduled dates and times,and others are availablewhenever you need them.Group supportGroup therapies can help you connect with other students while learning new skills in safe,supportive spaces with clinicians of mental health.Students report an improved quality of life throughthese clinician-aided groups.Visit Mental health clinical services to browse the available options anddiscover how to manage and overcome negative emotions and thoughts.21.Which service best suits people who want to keep their problems a secret?A.Self-guided support.B.Peer support.C.Workshops.D.Group support.22.Compared with workshops,what's the advantage of group support?A.Participants can learn new skills.B.Participants can talk with other students.C.Participants can get help from professionals.D.Participants can learn from those with similar experiences.2023届高三高考模拟测试英语试卷（二）第3页（共10页）

水考试·长对话理解【共5小题：1分，满分5分》你将到两段对话小题二有几个小题。请在每小题所效所下面一段对话回答第6至1小题Why doe en每段对话读两遍。B.Drink milk or fruit juiceC.Eat French fries.A.Because he has toepV.信息转换（共5小题；每小题1分，满分你将听到一篇短文。请根据短文内？的单词，每空仅填一词。短文读两遍。考试时间为120B.Because he lost his history homeworkC.Becasethn with his computer7.What does the gir think the mot important inventionjoWhenThe Trip to SanshaA.The radio.We'll have the trip next 16.Ti以2页)两部分。C.The mobile phone.WhereB.The computer.We'll have our trip to the beautiful上答题无效。China,Sansha.并交回。听下面一段对话，回答第8至10小题8.What did Jack do thisy?WhatEnjoy many strange and wonderfulYongxing.What else20分)A.He read a bookathome.B.He went back to his hometownYou can 19.heryour tickC.He watched a dragon boat raceHowWe'll go there by 20.February.听力音频.How did Li Mei liketh boat race?A.Boring19请在每小题所B.Interesting.C.Exciting.第二部分英语知识运用（共对话读两遍。10.How many players didea have?A.15.B.20.C.25.Ⅱ.短文理解（共5小题；每小题1分，满分5分】V.单项填空（共10小题；每小题1分从每小题所给的A、B、C、D四你将听到一篇短文，短文后有五个小题。请根据短文内容，白处的最佳选项。在每小题所给的A,B,C三个选项中选出一个最佳选项。短文读21.-Do you mind if I turn on TV n两遍。air11.What can a healthydand exercise help you?I'd like to watch sA.To get enough energy.A.Certainly notB.To look better and live longer.C.Of courseC.To get more money.22.The old must be taken good ca12.What do many children eat now?when their children are out toA.Too much junk food.A.lonelyB.scaryB.Too many vegetables.23.Bob thought he lostthe teacher's question.C.Too much meat13.How often do you need an exam?A.actionB.prizeA.Every week.B.Every monthC.Every year.24.-Are there any other ways14.Who will tell you how hethy you are?C-Sure.Use your head,therC.The doctorA.carefullyB.easilyA.Your parents.B.Your teacher15.What should you dofnt toimprove your health?25.-Did Claudia jump the hitalent in sporting activities.A.Eat much meat.英语押题卷（三）第2页（共12页）英语押题卷

Even chess experts perform worse when air quality is lower,suggesting a negative effecton cognition ()Here's something else chess players need to keep in check:air pollution.That's the bottom line of a newly published study co-authored by a researcher,showingthat chess players perform objectively worse and make more suboptimal (moves,asmeasured by a computerized analysis of their games,when there is more fine particulatematter(颗粒物)in the air,.notated as PM2.5.More specifically,given a modest increase in fine particulate matter,the probability thatchess players will make an error increases by 2.1 percentage points,and the spectrum of thoseerrors increases by 10.8 percent.In this setting,at least,cleaner air leads to clearer headsand sharper thinking."We find that when individuals are exposed to higher levels of air pollution,they make圜more mistakes,and they make larger mistakes,"says Juan Palacios,an economist in Sustain-able Urbanization Lab.约"It's pure random exposure to air pollution that is driving these people's performance,"Palacios says."Against comparable opponents in the same tournament round,being exposed蚁to different levels of air quality makes a difference for move quality and decision quality."The researchers also found that when air pollution was worse,the chess players长performed even more poorly when under time limitation."We find it interesting that thosemistakes especially occur in the phase of the game where players are facing time pressure,"☒Palacios says."There are more and more papers showing that there is a cost with air pollution,and舒there is a cost for more and more people,"Palacios says."And this is just one example show-ing that even for these very excellent chess players,who think they can beat everything,it务seems that with air pollution,they have an enemy who harms them."28.What effect does air pollution have on chess players?的A.They make fewer good choicesB.They perform subjectively worse.C.They suffer body discomfort.D.They lose all games with computers.29.What does the underlined word "spectrum"in paragraph 3 probably mean?A.Magic.B.Process.C.Range.D.Balance.30.What does Palacios express in the last paragraph?A.His appeal for attention to chess players.B.His concern about air pollution.C.An example of chess players'performance.D.Approaches to dealing with air pollution.31.What's the main idea of the text?A.Air pollution is a tough enemy chess players face.B.Chess players make more and more mistakes.【高二英语第5页（共10页门·23-522B·

10.What do we know about the new study?A.It links heart disease to early death.阅It disagrees with previous research.阅12.What did the researchers do in their study?C.It needs further research on more individualsA.They referred to previous research.D.It needs involvement with more kinds ofB.They studied different diseases of plantsexercise.They used AI to analyze the experimental解11.What did Hoon Lee suggest people do?解recordings.Exercise properly.D.They adopted different ways to record theB.Go on a diet to stay healthy.sounds of plants.C.Go outdoors as much as possible.D.Engage in high levels of physical activity.9DWhen dehydrated(脱水)or snipped with13.What do the study authors say about the阅scissors(用剪刀剪断)，plants make popping noisesresearch?that are too high-frequency(高频率的)for humans阅It changes people's views on plants.B.It reveals the challenges plants face.to hear,a study suggests.C.It provides a cure for plant diseases.譯Researchers set up microphones near healthy理D.It shows animals have better hearing thanand stressed tomato and tobacco plants,both in apeople.soundproofed box and in a greenhouse setting.The14.What does the last paragraph mainly tell usstressed plants were either dehydrated or had theirabout the study?stems snipped.The team also recorded pots withA.Its results.B.Its process.only soil in them to check that soil,alone,didn'tC.Its methods.Its application.make any sounds.(They found it didn't.)On average,healthy plants let out less than one popper hour,but the stressed plants let out about 11 to15.Which of the following is a suitable title for the35,depending on the plant species and stressor.阅text?Drought-stressed tomato plants were the noisiest,Stressed plants make popping soundswith some plants letting out more than 40 pops perB.The cries of plants were successfullyhour.recorded解The team fed these recordings into a machine-解C.AI systems can be used to detect diseasedlearning algorithm(算法)一an AI system used toplantsidentify patterns in data-and found that theD.Different kinds of plants make differenttrained algorithm had about a 70%success rate inpopping soundsdifferentiating the sounds made by different plantsclose to different stressors.They trained another AI system to differentiate第二节根据短文内容，从短文后的选项中选出between drought-stressed and healthy tomatoes in能填入空白处的最佳选项。选项中有两项为多余阅a greenhouse with more than 80%accuracy.阅选项。Another model could tell what stage ofNobody likes to feel bored.It is an unpleasingdehydration a plant was in with about 80%experience.Today,we always do a lot of things to理accuracy.avoid boredom through games,music,phones,In additional experiments,the team successfully理recorded the cries of many other stressed plants,social media and so on.A 16 It turns out that neverbeing bored can actually hurt our creativity,whilesuch as wheat,corn and pincushion cactuses.controlled boredom can be the best stimulation(Although the researchers gathered these激)our mind needs.recordings by setting microphones about 10cmWe all need to be creative.It is very important toaway from the plants,our lives.C 17 We can feel like there is just no way to solvethey suggested that these sounds coulda problem or fix a situation.Here is where阅potentially be heard by animals and insects withboredom comes in.great hearing from 3 to 5 meters away."TheseBeing bored for a while is good for the brainfindings can change the way we think about theand is proven to stimulate our creativity.When weplant kingdom,which has been considered to bealmost silent until now,"the study authors wrote.理are always entertained,the mind takes the path of解least resistance.G 18In the future,humans could take advantage ofHowever,we don't have to trouble ourselvesrecording devices and AI to monitor crops forwith boredom for a long time for this to work.these signs of dehydration or disease,the19 E Putting our smart devices away is hugelyscientists suggest.important,as they can provide an easier way forour brain to have fun.3

only hold 20 people.But there are 30 people scheduled to come to my talk nextSaturday.W:OK.We have three rooms that would suit 30 people.The Ballroom is suitable forparties.The Phoenix Lounge has comfortable sofas,a game table,andcoffee-making machines.It's ideal for informal meetings.The Oakwood Room ismore formal,with tables and chairs.M:This is a health and safety course.A formal room would be best I'd say.W:OK.In that case,I'll call our manager this afternoon and check if it's available.Iwon't be in the office on Thursday,but we should be able to confirm everything onFriday.If you have any questions,we can discuss them then.M:Sounds like a plan.Thanks a lot.(Text 9)W:John,you made an amazing journey,travelling across Europe on a skateboard.What made you decide to do it?.M:I heard about an organization called Boardwalk that helps teenagers withdifficulties.I'm good at skateboarding and I know Europe well.So I thought aboutraising money for Boardwalk by skateboarding from France to Spain.W:Did you get help from local businesses?M:Definitely.I already had all the camping equipment I needed,so severalcompanies rented a back-up vehicle to carry my tent and luggage.W:Did you have any accidents?M:Just one,in Barcelona.I was having my photo taken for my website.I jumped off

试题答案 1~5 BCAAB 6~10 BCABB 11~15 CAABA 1620 CCCBB 附： 听力部分录音材料 (Text 1) W:What do you want to be in the future,James? M:I'd like to be an artist. W:Oh,really?I thought you said to be a poet. (Text 2) W:Oh...I like this one. M:Oh,it's beautiful!But I don't own a bank,honey.We can't afford it.

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高三第一轮复周测卷·数学（二）23G3ZCJ(新高考)数学-R-必考=FJ·A【解题分析】由题设可得(a一1)2一4≤0，解得一1≤a≤3，故实数a的取值范围是[-1,3].【答案】[-1,3

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二、古代诗文阅读(35分)来消除天下人的疑心，于是让魏征做太子太师。(一)文言文阅读（本题共5小题，20分）D.魏征深受太宗宠幸。他生病时，太宗派人问讯赐药并把衡山公主嫁给他的儿子；他去世阅读下面的文

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B.回目“西厢记妙词通戏语”中的“妙词”既可以理解为《西厢记》中的曲词或者对白，还可以理另一个时间。另一个场面。夕阳在山，沿河的山坳里有一队人，从“生产”归来，兴奋的淡话解为宝黛之间的玩笑话。中，至少

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22.陈独秀在1915年说：“政治之不等，一变而为社会之不等；君主贵族之压制，一变而为资本家之压制。此近世文明之缺点，无容讳言者也。”据此可知，陈独秀27李大钊指出：“国内的产业多被压倒，输入超过

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1、炎德英才大联考 长沙市一中2024届高三月考试卷(二)2数学答案

号=号m品52.B【解析】由题设知，f(1)=-f(-1)=-(31+1)=-4综上可知，m<一3.A【解析】因为y=2,y=(2)均为增函数，所以f(x)=24D【解标】条件（任士）<之，>>0）表

2、炎德英才大联考·长沙市一中2024届高三月考试卷(六)6数学答案

全国©0所名接单元测试示范卷教学札记C.sin(a)-cosaD.cos(37-a）=-sina解折：sin(x十a)=一sine,放选项A错误：os(3x-a）=-G0sa,放远项B正确：sin(

3、炎德英才大联考·长沙市一中2024届高三月考试卷(五)5数学答案

21.【解析】(1)设M(m,0),N(0,n),P(x,y)，则m2+n2=9(xy-n)=2(m-x,-y）,故m=弓x,n=3y.…代入上武整理得：父+y=1所以动点P的轨迹C的方程为4*2=1

4、炎德英才大联考·长沙市一中2024届高三月考试卷(六)6数学答案

10.D设10件产品中有次品0件，P(X=1)巴-君化简得-10a+21=0.解得nC3或=7（舍），估计该批产品的次品率为30%.1.书由题意知，甲、乙选释冰上自行车的概率都为选择其他项目的概率都为

5、炎德英才大联考 长沙市一中2024届高三月考试卷(二)2数学试题

解得g=2或=一1（舍去），=2.所以数列{an}是首项为2，公比也为2的等比数列，所以an=2·2”-1因为a1+4-2,所以{an+4}是以2为首项，2为公比的等比数列，=2”.故an十4=2”，

1、炎德英才大联考湖南师大附中2024届高三月考试卷(六)语文答案)

根据第⑨段“人机协作如何更聪明，人机对话如何更友好，是‘人工智能十教育的长期课题”可知，“人工智能十教育”，需要继续发展研究，还有很长的路要走。5.本题考查学生分析和运用材料相关信息的能力。根据第六段

2、炎德英才大联考 湖南师大附中2024届高三月考试卷(六)6数学答案

1、炎德英才大联考湖南师大附中2024届高三月考试卷(六)语文答案)

根据第⑨段“人机协作如何更聪明，人机对话如何更友好，是‘人工智能十教育的长期课题”可知，“人工智能十教育

3、炎德英才大联考 湖南师大附中2024届高三月考试卷(六)6政治答案

1、炎德英才大联考 湖南师大附中2024届高三月考试卷(一)1政治答案

与本国国情相结合、与时代发展同进步、与人民群众同命运，才能焕发出强大的生命力、创造力、感召力。”这表明

4、炎德英才大联考 湖南师大附中2024届高三月考试卷(四)4物理答案

1、炎德英才大联考 湖南师大附中2024届高三月考试卷(一)1物理试题

13.(10分)一辆汽车以大小=15m/s的速度在直公路上匀速行驶，其正前方有一辆出租车以大小2=1

5、炎德英才大联考湖南师大附中2024届高三月考试卷(六)语文答案)

一、现代文阅读（35分) (一)现代文阅读I(本题共5小题，19分) 阅读下面的文字，完成1~5题。 材料一： 随着社会的发展，我们的生活变得更加丰富多彩。概括地讲， 可以分为三大领域，即家庭生活、职

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三新教研联合体第二次联考参考答案一、单选题(28分，每小题4分，每小题只有一个选项符合题意。错选或不答的得0分。)1234567ADABDB二、多选题，（每小题有多个选项符合题意。全部选对的得5分，选对但不全的得3分，错选或不答的得0分。)8910BCDBCBD三、实验题：（共2小题，共15分。）11.5.02分)吉=品w(2分)2(2分)12.(1)1300(2分)×1k(2分)(2)221或222(2分)(3)右(3分)四、计算题（本题共3小题，满分42分。解答时请写出必要的文字说明、方程式和重要的演算步骤，只写出最后答案的不能得分。有数值计算的题，答案中必须明确写出数值和单位。)13.(12分)解：对乙：μmg=ma乙…(2分)对甲：μmg+μ…2mg=ma甲(2分)因甲的加速度大，先减速到零，之后静止，而乙继续减速，直到停下。甲向左运动的距离：X男=哈(2分)2a乙向右运动的距离：X乙=2a2(2分)最终乙恰好未从甲上滑落，则木板甲的长度为：L=X甲十XZ…(2分)L=2v6(2分)3μg14.(14分)解：(1)下滑S2:mgszsin =mv2(2分)v=2m/s(2分)(2)导体棒ab边进入磁场切割磁感线产生的感应电动势E=BLy(1分)由闭合电路的欧姆定律：1=是(1分)金属棒进入磁场后作匀速运动：mgsin0=BIL(2分)