第二节 (共15小题;每题1.5分,满分22.5分)

听下面5段对话或独白。每段对话或独白后有几个小题,从三个选项中选出最佳选项。每段对话或独白读两遍。

听下面一段对话,回答第6-7小题。

6. What did the man do at this weekend?

A. He watched TV.     B. He went to the cinema.    C. He went shopping.

7. What does the woman think about the roommate?

A. He's stupid.        B. He’s strange.        C. He's rude. 

听下面一段对话,回答第8-10小题。

8. What salary does the company pay the first year?

A. $15,000.         B. $12,000.          C. $10,500.

9. Who is the woman most probably?

A. The man’s wife.   B. The manager of the company.   C. The man’s teacher.

10. What is NOT talked about in the interview?

A. Pay.             B. Vacation.          C. College life.

听下面一段对话,回答第11-13小题。

11. Where are the two speakers?

A. On a bus.         B. In the shopping district.    C. In a department store.

12. What’s the largest building to the left?

A. The bank building.   B. The department store.        C. The City Hall.

13. What do the signs mean?

A. A play will be put on.   B. There are some good stores.   C. Men’s clothing is on sale.

听下面一段对话,回答第14-17小题。

14. What are Jack and Jane planning to do?

A. To have the spring festival.    B. To have the spring break.   C. To have the summer vacation.

15. Who will pay for the lodging during their trip?

A. Jane.             B. Bob.       C. Jack.

16. What is the weather like?

A. A bit hot.      B. A bit cold.    C. A bit windy.

17. What time will Jack come to pick up Jane?

A. About five o’clock.     B. About half past six.    C. About six o’clock.

听下面一段独白,回答第18-20小题。

18. What’s the probable season now?

A. Spring.           B. Summer.      C. Winter.

19. Why did the gentleman carry the umbrella?

A. To use it as a walking stick.   B. To protect himself from the sunshine.    C. To pretend to be stupid.

20. How did the old man feel when he heard people say ‘Look at that old man!’?

A. Happy.      B. Embarrassed.      C. Stupid.

55.大豆植株的颜色受一对等位基因控制。基因型AA的植株呈深绿色,基因型Aa的植株呈浅绿色,基因型aa的植株呈黄色。深绿色和浅绿色植株的繁殖和生存能力相同,而黄色植株会在幼苗阶段死亡。

(1)基因型为AA的植株,茎叶为深绿色,而在遮光条件下茎叶为黄白色,这是因为光照影响了                     ,从而影响叶绿素合成。

(3)如果让深绿色植株给浅绿色植物受粉,其后代成熟植株中,基因型是          ,其中深绿色植株的比值为        。

(4)现有一批浅绿色植株(P),经相互授粉得到F1,成熟的F1植株经相互授粉得到F2……,以相同的方法得到Fn。

①F2成熟的植株中,浅绿色植株所占的比值是       。

②用遗传图解表示由P得到F1的过程。

(5)另一大豆植株的颜色受两对基因控制,基因型A  B 的植株呈深绿色,基因型aabb的植株呈浅绿色,基因型A bb的植株为花斑色,基因型aaB 的植株为白化。

①若一株基因型为AaBb的植株与一基因型为aabb的植株杂交,后代仅出现了花斑色大豆植株和白化大豆植株,其比例接近1︰1。这种现象出现的根本原因最可能是

                                 

②若一株基因型为AaBb的植株与另一基因型为AaBb的植株,子一代出现四种表现型,其比例为:深绿色︰花斑色︰白化︰浅绿色=9︰3︰3︰1。请写出一种探究两对基因存在于两对同源染色体上的验证试验的方法名称。              

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