1政治(新)答案)
1、高三2024年普通高等学校招生全国统一考试·冲刺押题卷(一)1政治(辽宁)答案1、高三2024年普通高等学校招生全国统一考试·冲刺押题卷(一)1生物(辽宁)答案1、高三2024年普通高等学校招生全国统一考试·冲刺押题卷(一)1地理(辽宁)答案
1生物(新)试题)
2024～2025学年度高三年级第二次检测模拟卷·生物学参考答案、提示及评分细则1.D细菌没有核膜，其分裂过程中不存在核膜的消失与重建，D错误。2.A伞藻的假根中除了细胞核外还存在部分细胞质，因此嫁接实验不能说明细胞核是决定伞帽形态的唯一结构，A错误；若细胞核去除后过长时间未接入新核，细胞缺少控制中心的控制作用，可能会死亡，B正确；核源，因变量是新长出的伞帽的形状，D正确。3.A为保证实验的准确性，所以对照实验中第一步加入的A是1mL蒸馏水，A正确；缓冲液可以有效避免无关变量对实验结果的影响，但不是完全避免，B错误；据实验结果可知，淀粉酶活性较高的是白粒小麦，C错误；第三步中的淀粉溶液浓度减小，即反应物减少，为保证显色结果不变，应适当缩短保温时间，D错误。4.C酶具有专一性，酶的专一性是指每一种酶只能催化一种或者一类化学反应，A错误；乳酸脱氢酶在细胞质基质中将丙酮酸转化为乳酸，为无氧呼吸第二阶段，该阶段不产生ATP，B错误；马铃薯等植物大部分细胞进质是相同的，所以马铃薯等植物细胞中可同时存在编码乙醇脱氢酶和乳酸脱氢酶的基因，C正确；糖酵解过程中产生丙酮酸，无乳酸或酒精生成，若为无氧环境，丙酮酸在细胞质基质中与LH进一步转化为乳酸或酒精和CO，D错误。5.B实验中所用的解离液由体积分数为95%的酒精和质量分数为15%盐酸溶液制成，A正确；本实验并未进行不同浓度吲哚乙酸对根尖的影响，故无法判断，B错误；根据统计的有丝分裂间期细胞数和细胞总数不能计算出一个大蒜根尖细胞的细胞周期，C正确；各组的细胞有丝分裂指数均低于10%，是因为细胞周期中分裂期所占比例小，D正确。6.A加热是使eccDNA分子互补碱基对之间的氢键断裂，使eccDNA分子双链变成单链，A错误；若eccDNA分子有100个碱基，其中A有20个，则G和C共有100-20-20=60个，G=C=30，A与T之间有两个氢键相连，C与G之间有三个氢键相连，故该DNA分子中共有氢键3×30十2×20=130个，B正确；eccDNA可通过提供额外的基因，从而增加生物的遗传多样性，C正确；一条链上的一个C突变成了T，则以该链为模板形成的子代DNA都是错误的，而以另一条链为模板合成的子代DNA都是正常的，所以复制次后，发生差错的DNA占1/2，D正确。7.Blin-14蛋白质编码基因与lin-4基因的根本区别是碱基序列不同，A正确；过程B为翻译，核糖体移动的方向是由a到b，即5到3，敌甲链a端是5端，B错误；由图可知，RISC-miRNA复合物中的RNA与lin-14mRNA能够通过碱基互补配对相互结合，从而抑制翻译过程，C正确；肽链中氨基酸序列由相应的mRNA决定，由已知的控制该肽链合成的基因碱基序列可推出对应的mRNA序列为：3'—AUUAGUUGAAUUGUAC—5'，密码子的阅读从起始密码子5一AUG—3'开始，到终正密码子5一UGA一3为止，因此可能对应的肽链的氨基【高三年级第二次检测模拟卷·生物学参考答案第1页（共4页）
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1、C20教育联盟2024年九年级学业水测试″最后一卷″答案(政治)2024届江苏省扬州市高三考前调研测试政治试题一、单项选择题：共15题，每题3分，共45分。每题只有一个选项最符合题意。1.方向决定道路，道路决定命运。我们的社会主义为什么不一样？为什么能够生机勃勃、2、[百师联盟]2025届高三开年摸底联考政治(百S)试题1、百师联盟 2024届高三开年摸底联考化学(广西卷)试题1、百师联盟 2024届高三开年摸底联考化学(广西卷)答案1、百师联盟 20243、湖南省2024年九年级（上）月考试卷（一）数学试题1、湖南省2024年九年级（上）月考试卷（一）政治试题1、安徽省六安市2024年高三教学质量检测英语试题1、安徽省2023-2024期末九4、江西省2025届九年级训练（二）历史试题1、江西省2025届九年级训练（二）历史试题1、[学科网]2024届高考考前最后一卷地理(辽宁卷)答案1、[名校之约]2024届高三新高考5、安徽省芜湖市2024-2025学年度第一学期九年级素质教育评估试卷政治试题1、安徽省芜湖市2024-2025学年度第一学期九年级素质教育评估试卷政治试题1、安徽省芜湖市2024-2025学年度第一学期九年级素质教育评估试卷政治答案
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18.（本小题满分17分）已知倾斜角为=的直线7经过抛物线r:y²=2px(p>0)的焦点F,与抛物线交于A，B两点，线段AB的长为8.（1）求p的值；（2）在x轴的正半轴上存在点T，使得TA⊥TB,求点T的坐标及三角形TAB的面积；（3）若直线m与抛物线r交于P，Q两点，与圆C2:（x-3）²+y²=6交于两个不同的点D，E，求PD|·PE的最小值19.（本小题满分17分）已知函数f（x)=e*-bx+e²，b>2e².（1）求曲线y=e在点（2lnb，b²）处的切线方程；（2）证明：函数f（x）有两个零点；（3）记第（2）问中的函数f（x)的两个零点为x，x(x
Bo.what is the key for a placebo to work according to the text?A.The degree of pain.B.The person's belief.C.The type of illness.D.The doctor's advice.What does the author want to say in the text?A.Placebos are ineffective in medicine.B.Medicine is the best way to treat illness.C.Pain cannot be relieved without medicine.D.The mind influences the healing of the body.DThe world's largest capital cities are seeing more extremely hot days than ever,accordingto a new study,which says the dangerous trend()is being driven by scorching temperaturesacross Asia as the climate problem worsens.The world's 20 largest cities-together home to more than 300 million peoplehave seena 52%jump in the number of days surpassing 35C over the past three decades,according toan analysis by the International Institute for Environment and Development(IIED)."Climate change is not just a future threat-it's already happening and getting worse,"IIED senior researcher Tucker Landesman said."In just one generation,there's been analarming increase in the number of days of extreme heat affecting some of the world's biggestcapital cities-made worse by the urban heat island effect,which occurs when cities replacenatural land with roads and buildings that keep more heat."Extreme heat can be deadly,especially for groups at risk who have weaker physiologicalregulatory()abilities.Higher riskiduringi heat waves can also have a very damagingimpact on informal and.hourly workers,who may face work stoppages or a choice betweenstaying home unpaid or working in dangerousi conditions.Heat also hurts economies,damaging crops and animals and reducing labor productivity.According to a 2022 DartmouthCollege study,extreme heat has cost the global economy large amounts of dollars since theearly 1990s,with the world's poorest countries bearing the force of the impact."Responding to the challenge of extreme heat will require decisive action from policymakers.including serious investment to adapt to this new reality,"said Landesman."For many cities.it's not a lack of knowledge or capacity or resources that's preventing large-scale action toaddress climate change,rather it's a lack of political will and governing tools.2.Which can best explain the underlined word"scorching"in paragraph 1?9A.Slightly mild.B.Extremely hot.C.Rarely cold.D.Fairly pleasant.33.How does the author show the extremes of heat in big cities?A.By giving an example!B.By conducting a research.C.By listing figures.D.By comparing temperatures.4.Which of the following are most likely at risk during heat waves according to the text?A.Healthy adults.C.Young children and the elderly,B.Tourists in a museum.35.What is the fourth paragraph mainly about?D,Urban planners and policymakers.A.The various harms caused by extreme heat.B.The effects of extreme heat on human health,C.The increasing trend of extremely hot days globally,D.The pressing need for political action on elimate change.【高二期末联考试卷，英语第5页（共8页）】
thrilling B. Doubtful.A. Worried.C. Unclear.hD. Supportive.9Dtoh,st， novels.rtsCiassicasMcQuerry's team examined data about 166 patients, from babies to 17-year-olds, whoiasedchildren had low levels of vitamin D and these children were likely to take significantly longer）to recover.heProfessor Scarlett McNally, the deputy director of London's Center for PerioperativeCare, said, “Vitamin D helps in many body functions, including repair of bones and tissues.It is a vitamin that helps the body manage calcium which keeps your bones strong and isngneeded for muscles to contract. Vitamin D also has a role in immune (免疫) function, helpingayour body deal with infection and cancer. It also has a role in cell division--essential for tissuenisrepair. "usThe study's authors said that previous studies had focused on how vitamin D can helpprevent fractures (骨折), but this new research is making up for the fact that vitamin D forayoreyour child for vitamin D levels if a broken bone is taking a long time to recover.aynd-ewlicteseseA. The side effects of medicine.B. The functions of vitamin D.C. The good ways to keep fit. D. The roles of bones and tissues.【高二英语第6页（共10页)】
