衡水金卷2022-2023学年度高三一轮复习摸底测试卷英语(二)答案

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1、衡水金卷2022-2023学年度高三一轮复习摸底测试卷英语(二)答案

2、衡水金卷2022-2023学年度上学期高三一轮复习摸底测试卷语文(一)答案

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4.C复制过程中,合成的子链是从切口处3′羟基端连接上新的脱氧核苷酸,故5′-磷酸端会游离出来,3-羟基端连接新的脱氧核苷酸需DNA聚合酶,A正确;新正链全部合成后仍然与老正链以化学键相连,需要通过酶把老正链和新正链切开,B正确;已知正链有m个碱基.G+C=n,复制出的负链也有m个碱基,其上G+C=n,则由正、负链组成的双链DNA中,A=T=m一,G=C=m,由最初到最后多出一个双链DNA,需消耗游离的腺嘌呤脱氧核苷酸(m-n)个,C错误;若最初正链DNA全被P标记,侵染3P的宿主细胞,正常情况下次滚环复制后形成的双链DNA都只含有P,D正确。后(只

new plans to finish building its space station and go to Mars and beyond. It plans to finishbuilding its space station around 2022.According to China’stop space scientist Zhou Jianping,by that time, becoming an astronaut will be a normal job. Astronauts are need d more thanever before. They need to be able to finish more tasks. So far, China has been choosing astro-na uts mainly from pilots like Yang Liwei. In the future, astronauts will also be picked fromengineers, doctors and space technology experts. Another plan is about Mars. In order to ex-plore Mars, China sent a spacecraft first to Mars around 2020. It landed there and will be expected to bring back things from Mars.