24.The law ,which was passed for the benefit of 　　　　　public ,forbade people to smoke in　　　　　 　public places .

　　 A . / ;the　　 B .the ; the　 C .the . /　 D ./ ; /

23. ---- Your daughter has won the first prize in the contest .What a smart girl she is !

--- .______________ .

A　 It’s nice of you to say so　　　 B .She was really lucky

C .　 No one else could do it　　　 D . Oh ,not really

第一节：单项填空　 (共15 分)

21　 . There are signs ____ restaurants are becoming more and more popular with families.

A .that　　 B.which　　 C .in which　 D　 . whose　

22. He is looking forward to taking　 part in the peace conference ------ in a neutral country next month .

A . holding　　 B . held　 C . to be held　 D .being held

第二节：听第六段材料回答第(6－8)题

6. Why was Paul angry with Jane?

A. She told the others about his salary.　　　 B. She told Mrs. Wallace his salary.

C. She always talks to everybody.

7. Why did Jane tell Mrs. Wallace the news according to her own explanation?

A. Because she thought it doesn't matter.

B. Because she knew everybody would know at last.

C. Because she got too excited and wasn't thinking.

8. What does Paul mean by "Everyone in this town got a big nose"?

A. People in this town have big noses.

B. People in this town are always eager to know about others' things.

C. People don't care about each other.

听第七段材料回答(9－11)题　

9. What is the man reading?

A. A magazine.　　　　　　　 B. A Chinese play.　　　　 C. A newspaper.

10. Where are they going at the weekend?

A. Beijing Theater.　　　　 B. Beihai Park.　　　　　　　 C. Beihai Cinema.

11. What are they going there for?

A. For a visit.　　　　　　 B. To see Beijing Opera.　　　　　　　　　

C. To learn Beijing Opera.

听第八段材料回答(12－14)题

12. Why didn't Mike take an examination yesterday?

A. Because he didn't want to do so.　　 B. Because he got sick.

C. Because he got the examination date wrong.

13. What did the professor permit Mike to do?

A. Have all examination at home.

B. Have an exam sometime later when he got better.

C. Have an exam next term.

14. Why didn't Mike drive his car?

A. Because the doctor told him not to.

B. Because he liked taking a walk.

C. Because he didn't think he was able to.

听第九段材料回答(15－17)题

15. What does Rogers mean in this conversation?

A. Tom's friend.　　　　　 B. Tom's teacher. 　 C. The name of a person.

16. What does Tom tell his mother in yesterday's lecture?

A. He had made a new discovery.　　　　 B. He had lost his new job.　　 C. He had just bought a car.

17. Why does Tom tell his mother about his job?

A. Because he doesn't want her to worry about his job.

B. Because he doesn't want her to worry about his life.

C. Because he doesn't want her to worry about his marriage.

听第十段材料回答(18－20)题　

18.　 Where did the fire probably start?

A. On the first floor.　 B. On the second floor. C. On the third floor.

19. When was the building built?

A. In 1930.　　　　　　　　　 B. In 1782.　　　　　　　　　　 C. In 1718.

20. What was the building used as at the time of the fire?

　　　　 A. A history museum. 　 B. A hotel.　　　　　　　　 C. The old people's home.

第一节听下面五段对话选择最佳选项

1. What's the most probable relationship between the two speakers?　

A. They are host and guest.　 B. They are waiter and customer.　　　　　

C. They are husband and wife.

2. Where did this conversation take place?

A. At the hospital.　　　　 B. At the airport.　　　　 C. At the post office.

3. Why will the woman go to London?

A. To have a look at London.　　　　　　　　　 B. To go with her friend.　　　　　　　　　

C. To spend the weekend.

4. What's the woman's job?

A. She is a saleswoman. 　　　 B. She is a waitress. 　　　 C. She is a hotel clerk.

5. How is the weather now?

A. It's snowing.　　　　　　 B.　 It's raining.　　　　　　　　 C.　 It's clear.

45、(6分)根据下图，回答下列问题：　

　 (1)此图解全过程叫　　　　　　　　 。　　　　　

　 (2)图中③的重理过程叫　　　　　　 ；该过程需要在　　　　　 的作用下才能进行。

　 (3)图中④的生理过程叫RNA复制；该过程的发现，说明RNA也可作为生物的　　　　　　　　 。

　 (4)从DNA的功能看，图中①过程属于DNA的　　　　　 功能；图中②和⑤过程属于DNA的　　　　　　　　　　 功能。　

44、(8分)基因突变是指基因结构的改变，科学家常常利用物理、化学的方法来诱导生物发生基因突变，以便能获得大量突变类型，使人们能从生化的角度在分子水平上对它们进行遗传分析，其中、、射线、紫色线等为物理的诱变因素；亚硝胺、乙酸亚胺、乙二胺、四乙酸等为化学诱变因素。根据上述内容回答下列问题：

　 (1)下列对基因突变的描述不正确的是 (　 ) 　　

　　 A、由于人们可以定向诱导突变性状，诱变育种能明显地缩短育种年限

　　 B、它是生物进化的重要原因之一　　　　　

　　 C、丰富了生物的“基因库”

　　 D、突变频率低且突变性状一般有害，少数有利

　 (2)电离辐射诱导生物基因突变时，细胞中吸收辐射能量最多的化合物是　　　　　 ，原因是　　　　　　　　　　　　　　　　　　　　　　　　　　 。

　 (3)根据下图下列细胞中物质的吸收峰值，可知紫外线(＝2700A)在诱导突变过程中的主要作用物质是　　 (　　 ) 　　

　 　A、核酸　　 B、水　　 C、脂肪　　 D、蛋白质

43、(10分)下图中的A、B分别是甲、乙两种遗传病的系谱图。请分析回答问题：　　　　　

　 (1)图A中甲病的遗传方式是　　　　 ，请写出你的判断依据　　　　　　　　　　　

　　　　　　　　　　　　　 。　

　 (2)如果B图中的Ⅲ₇和Ⅲ₉婚配，他们生出患病孩子的概率是　　　　 ，因此，我国婚烟法明确规定直二代以内旁系血亲禁止结婚。B图中Ⅲ₇和Ⅲ₉属于　　　　 血亲。

　 (3)随着人类基因组计划研究的深入和基因工程技术的发展，人们将可以运用基因诊断的方法来快速检测人类遗传病，即用放射性同位素(如³²P)、荧光分子等标记的DNA分子作探针，利用　　 　　　　　　　原理，鉴定被检测标本上的遗传信息，达到检测人类遗传病的目的。

42、(12分)生态工作者从东到西对我国北方A、B、C三种类型的草原进行调查。下表是不同调查面积的物种数量统计结果：　 　

　 (1)A、B、C三种类型的草原对放牧干扰的抵抗力稳定性由强到弱的顺序是　　　 。导致这三种类型的草原物种数量不同的关键生态因素是　　　　 。如果将A草原与我国东北针叶林相比，两者之间恢复力稳定性较强的是　　　　　　　　　　　　　　　　 。　　　　　

　 (2)调查B草原某种双子叶草本植物种群密度时，设计如下调查步骤：①选取40m×40m为最佳样方面积；②在该物种分布较密集地方取5个样方；③计数每个样方内该植物的个体数。若计数结果由多到少依次为N₁、N₂、N₃、N₄、N₅，则将N，作为种群密度的估计值。

请指出以上设计步骤中的错误并加以改正。　

①　　　　　　　　　　　　　　　　 　　　　　　　　　　　　　　　　　　　

②　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　

③　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　

41、(4分)科学家利用辐射诱变技术处理红色种皮的花生，获得一突变植株，其自交所结的种子均具紫色种皮。这些紫色种皮的　

　 种子长成的植株中，有些却结出了红色种皮的种子。　　　　　

　 (1)上述紫色种皮的种子长成的植株中，有些结出了红色种皮种子的原因是　　　　　　　　　　　　 　　　　　　　　　　　　　　　　　　　　　。(2分)

　 (2)上述紫色种皮的种子，可用于培育紫色种皮性状稳定遗传的花生新品种。假设花生种皮的紫色和红色性状由一对等位基因控制，用文字简要叙述获得该新品种的过程：　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　 。(2分)