15.江南水乡民居房房相连，中间采用风火墙隔断的日的是 A.防潮 B.防火 C.隔热 D.通风

解析：截至2019年，西藏城镇化率仅有31.50%，远低于全国 均水，可推知目前西藏农村人口仍占绝对优势，工业生产水 低，工业化提供的就业机会有限，农村剩余劳动力的释放较缓慢。 答案：A

城镇化进程有三个阶段：初始阶段是城镇人口占总人口的比重 在30%以下；中期阶段是城镇人口占总人口的比重为30%一70%； 后期阶段是城镇人口占总人口的比重在70%以上。截至2019年，上 海常住人口城镇化率最高，达到88.10%；江西常住人口城镇化率为 57.4%;西藏常住人口城镇化率最低，仅有31.50%。读 2015一2019年我国常住人口城镇化率(%)统计图，完成12~13题。 62 61 60.60 0 59.58 59 58.52 58 57.35 765 56.10 2015 2016 2017 2018 2019年份 12.我国目前城市化进程仍处在 A.初始阶段B.中期阶段C.后期阶段D.无法判断

解析：图中①④两地接近工业区，污染较重；②地与工业区之 间有铁路相隔，工人上下班并不方便；③地位于郊外，附近有森林 公园和地铁，环境较好，交通便利，为高级住宅区。 答案：C

解析：地租的高低与离城市中心的远近和交通的通达度有关。 图a中甲乙一线河流和两条主要公路两侧地租较高，其中左边公路 贯穿整个城市，交通通达度最好，地租最高。 答案：D

某城市地处原地区，图示意该城市功能分区，图b示意该 城市地租变化。据此完成89题。 细商业区 ↑地租 住宅区 文化区 3 轻工业区 ☑化工区 w铁路 火车站 一公路 二河流 甲 图a 图b 8.若该城市功能区分区合理，则其主导风向和河流的大致流向可 能是 A.西风 自西向东 B.西北风自东向西 C.东南风自东向西 D.东风自西向东

解析：制约环境承载力的因素有资源数量、科技水、地区开 放程度、人们的消费水等，其中自然资源是影响地区环境承载力 的首要因素。 答案：B

the screens of stopwatches,they once again saw a skewed num ber. Faux says that the obvious solution is for stopwatches to have large data tables for transforming the numbers of oscilla- tions into the time in seconds,rather than using an algorithm. The researchers now hope to investigate whether the errors are found at large sporting events. New Scientist asked the International Olympic Committee if timing at the Olympic Games could be affected by this phenome non.The IOC passed the request for comment to Omega,the of- ficial timekeeper of the Games,which didn't respond.

第二部分阅读理解（共4小题；每小题7.5分，满分30分） 阅读下面短文，从每题所给的A、B、C和D四个选项中，选出 最佳选项。 Digital stopwatches can make rounding(四舍五入的) errors of up to 0.11 seconds,which could be enough to change the win ner of close races.Although the devices record time extremely accurately,they often make errors when changing that raw data to human-readable numbers. Most digital stopwatches measure time by counting the pre- dictable oscillations (of a quartz crystal.The crystal will pulse many thousands of times a second and the final count is transformed into seconds in a format known as a floating-point representation that is commonly used by digital devices.

good introduction to the course,and it will probably cover a lot of useful information about the upcoming semester. W:Maybe you're right.It's just that I hate being in large groups.I'm not going to know anyone there. M:You'll know me,though.Besides,I think it will be a good chance to meet people,and there will probably be times when we will have to work together in groups. W:Our course outline seems to have all the information we need. I can't see there is anything new to discuss. M:I heard there will be a former graduate there to provide details about what kind of job opportunities are out there after we graduate.It could be more helpful than you think. W:I don't know.