英语周报2021-2022高考24期答案

17.BC【解析】由图可知,①过程中的chL基和②过程中的红霉素抗性基因插入的位置不同,因此,应使用不同的限制性核酸内切酶,A项正确;q过程都要使用DNA连接酶来获得重组质粒,B项错误终止子是基因表达载体的重要组成部分,而终止密码子位于mRNA上,C项错误;若操作成功,则该变异株含有红霉素抗性基因,在含红霉素的培养基中可以存活,由此筛选出变异株,D项正确。

【语篇导读】文章讲述机器人写地震突发新闻文章的有关事宜。2.D【解析】推理判断题。根据第一段中 When anearthquake hit the Los Angeles area on Monday morningat 6: 25 a. me Los angeles Times had thepublished in about three minutes. It was the first mediato report on the breaking news.可知,在报道地震时《洛杉矶时报》的效率很高。故选D。3.B【解析】细节理解题。根据第三段 found therobot-written story already finished in the system. af AllQuakebot自己写新闻报道。故选BC【解析】词义猜测题。根据第四段 It doesn'teliminate anybodys job as much as it makes everybodysjob more interesting,它不会消除任何人的工作,相反它让每个人的工作更有趣,由此推知画线词的意思是“移15.D【解析】标题归纳题。根据第一段 the laAngeles Times had their story published in about threenutes. It was the first media to report on the breakingwencke, a jourmalist and programmer for the LA Timesaid that an algorithm(ri*)he created called Quake-bot was behind the story.可知,本文讲述的是机器人写地震突发新闻文章。故选D。

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