1.下列有关真核细胞分裂的叙述,正确的是
A.在减数第二次分裂前期不含染色单体
B.在细胞分裂间期,DNA复制,染色体数目加倍
C.在减数第一次分裂的前期和后期均可能发生基因重组
D.处于有丝分裂后期的果蝇体细胞有两个染色体组
答案:C(细胞分裂间期,DNA虽然发生复制,但着丝点没有分开,故染色体数目不变;果蝇是二倍体生物,其体细胞中有两个染色体组,细胞有丝分裂后期有四个染色体组;在减数第一次分裂的前期同源染色体上的非姐妹染色单体之间可发生互换,后期非同源染色体自由组合均可能发生基因重组;减数第二次分裂前期每条染色体上含有染色单体。)
35. - Have you played baseball before? We need one more player.
- .I like ball games, so I believe it will be fun to learn baseball.
A. Sometimes B. Not really C. Never mind D. That’s cool
34. Many buildings in the city need repairing, but the one first is the library.
A. repaired B. being repaired C. repairing D. to be repaired
33. At the meeting place of the Yangtze River and Jialing River , one of the largest cities in China.
A. lies Chongqing B. Chongqing lies C. does lie Chongqing D. does l Chongqing lie
32. Today, we will begin we stopped yesterday so that no point will be left out.
A. when B. where C. how D. what
31.- Why do you want to work for our company?
-This is the job that I for.
A. looked B. am to look C. had looked D. have been looking
30. The news shocked the public, to great concern about students’ safety at school.
A. having led B. led C. leading D. to lead
29. The palace caught fires three times in the last century, and little of the original building now.
A. remains B. is remained C. is remaining D. has been remained
28. In China, the number of cities increasing development is recognized across the world.
A. where B. which C. whose D. that
27. Everything comes with price; there is no such thing as free lunch in the world.
A. a, a B. the, / C. the, / D. a, /
湖北省互联网违法和不良信息举报平台 | 网上有害信息举报专区 | 电信诈骗举报专区 | 涉历史虚无主义有害信息举报专区 | 涉企侵权举报专区
违法和不良信息举报电话:027-86699610 举报邮箱:58377363@163.com