26. We were all waiting for you. You _____ for the seaside by yourself without

leaving a message.

A. mustn’t leave　　　　 B. shouldn’t have left

C. could not have left　　　 D. needn’t leave

25. Though he is still a child, he has already read _____ 1,000 books.

A. so much as　 B. as many as　 C. as much as　 D. so many as

24. With online course Crazy English has over 20 million students all over China _____the class through the Internet.

A. attending　 B. attended　 C. attend　 D. to be attending

23. –There were already five people in the car but they managed to take me as well.

　 --It _____ a comfortable journey.

A. can’t be　 B. shouldn’t be　 C. mustn’t have been　 D. couldn’t have been

22. –Why, I couldn’t get you on the phone this morning.

--We _____ tennis in the yard when you called.

A. must be playing　 B. could be playing

C. must have played D. must have been playing

21. Tom as well as his classmates _____ Japanese in Japan.

A. are studying　 B. have studied　 C. studies　 D. study

第二节：听下面5段对话或独白，选出最佳选项。每段对话或独白读两遍。

听第6段材料，回答第6 -- 8题

6. What will Mary do tomorrow afternoon first?

A. See a doctor.　　 B. Meet a friend.　 C. Go to a ball

7. Where will the dancing party be held?

A. In the students’ club　 B. In a school hall.　　　　 C. On the playground.

8. When will Mary and her friend probably go to the party?

A. At about 5 p.m.　 B. At about 7 p.m.　　　 C. At about 4 p.m.

听第7段材料，回答第9 -- 11题

9. What kind of music does Mr. Zhang like?

A. Classical music. B. Jazz.　　 C. Both A and B.

10. Why does Mr. Zhang dislike going to the theater?

A. Tickets for plays are too expensive.

B. It is too noisy.

C. His English is not very good.

11. What can we learn from the conversation?

A. Mr. Zhang likes shopping in London.

B. Mr. Zhang likes cheap food.

C. Mr. Zhang likes Italian food.

听第8段材料，回答第12 -- 14题

12. How much more will they pay for their telephone calls this month than last month?

A. More than 3 pounds.　　　 B. Less than 3 pounds.　　　 C. 10 pounds.

13. Who do you think Jack is?

A. Their son.　 B. One of their friends.　　　　 C. The man’s secretary.

14. Why did Jack make so many telephone calls to London?

A. Because his uncle is in London.

B. Because his girlfriend is in London.

C. Because his grandfather is in London.

听第9段材料，回答第15 -- 17题

15. Where are the man and his friends probably?

A. In a bar.　　　　 B. In a hotel.　 C. At his house.

16. When does the conversation take place?

A. In the morning.　 B. In the afternoon.　　　　 C. In the evening.

17. What do you think of the man from the conversation?

A. He is cross　 B. He is unfriendly.　　　　 C. He is easy going.

听第10段材料，回答第18 -- 20题

18. Where does the announcement take place?

A. At a baseball stadium. B. At a department store. C. At an amusement park.

19. What is the boy wearing?

A. A solid white baseball cap.　　　 B. Black and white pants.

C. A blue and white sweatshirt.

20. Where is the boy now?

A. At the information desk.　　 B. In the sporting goods section.

C. At the cashier where you pay for goods.

第一节：听下面五段对话，选出最佳选项。每段对话仅读一遍。

1. How long did it take the man to write his paper?

A. less than an hour and a half.

B. Not more than half an hour.

C. More than an hour and a half.

2. What does the woman suggest?

A. They don’t have to go to the concert.

B. Her brother will let them use the car.

C. The bus is fine with them.

3. On which days next week will the man have examination?

A. Every day except Thursday.

B. Monday, Wednesday and Friday.

C. Monday, Tuesday and Friday.

4. Why is the woman moving?

A. The present room is too expensive.

B. She needs a quieter place.

C. She doesn’t like to listen to the radio.

5. What will probably happen to the woman?

A. Miss her train.　 B. Catch her train.　　 C. Cancel her train.

38．( 10分)甲图是动植物细胞亚显微结构模式图。乙图为人体免疫细胞参与机体免疫的图解，其中的字母表示细胞类型或由其产生的物质，数字表示作用过程。请据图分析(括号内填序号或字母，横格上填名称)

甲　　　　　　　　　　　　　　　　　　　 乙

(1)甲图右边细胞可能是下列哪种细胞? ［　］。

A．燕麦胚芽鞘　 　　　B．菠菜的叶肉　　 　　C．洋葱根的分生区　 　　D．蓝藻　　

(2)甲图含有色素的细胞器是 [　 ] 　　　　　　。

(3)细胞色素C是动植物细胞普遍存在的一种由104个氨基酸组成的化合物。控制细胞色素C合成的基因主要位于甲图[　 ]　　 中，该基因至少含有　　 个碱基对，其信使RNA在此处合成后进入细胞色素C合成场所的过程中，通过的生物膜层数是 　　　。

(4)乙图中的C物质是　　　 。如果甲图细胞②处有C，则此细胞名称为　　 　细胞。

(5)促使A形成C的原因是____________________________；C从开始合成到分泌出来，经过甲图中的细胞器依次为［　　　　 ］。

贵州省云峰中学2010届高三下学期3月月考

37．(10分)微核由染色体的断片或整条染色体形成，是真核细胞中的一种异常结构，呈圆形或椭圆形，游离于主核之外。微核往往由于细胞受辐射或化学药物的作用而产生，“微核检测”可用于了解化学物质的遗传毒性。

某中学研究性学习小组的同学为了了解厨房油烟能否诱导微核，采集了某家庭40天中厨房抽油烟机内积累的油烟冷凝物，用二甲基亚砜溶解后再用蒸馏水稀释，配制了一系列浓度的油烟冷凝物溶液，各取等量加入烧杯A、B、C、D中；另取等量二甲基亚砜和蒸馏水加入烧杯E，取等量蒸馏水加入烧杯F。之后，将6个大小和生长状况相同、幼根已培养至1 cm的洋葱，分别置于上述6种溶液中培养24h，然后再将洋葱转移到蒸馏水中继续培养24h。24h后从每个洋葱上随机取4条根尖并按常规方法制作临时装片，在显微镜下观察每个装片上的1000个根尖细胞，计算其中出现微核的细胞数目(微核的千分率)，结果如下表所示。

请分析回答:

(1)为什么将洋葱根尖在上述各种溶液中培养24 h？　　　　　　　　　　　　　 。镜检的细胞应该位于根尖　　　　　 区而且处在细胞分裂　　　　 期。　

(2)研究性学习小组的同学在取得洋葱根尖后，按“常规方法”制作装片，这种常规方法的操作步骤可简略表示为　　　　　　　　 　　　　　　　　　　　　　　　　　　。

(3)表中的项目2应该是　　　　　　　　　　　　　 。

(4)对A-D组而言，E组和F组中，哪一组是对照组？　　　　　　 。将E组和F组进行比较，能说明　　　　　　　　　　　　　　　　　　　　　　　　　　　　 。

(5)该实验可得出什么结论？　　　　　　　　　　　　　　　　　　　　　　　　　 　。