24. – Lucy doesn’t mind lending you her dictionary.
– She . I have already borrowed one.
A. can’t B. mustn’t C. needn’t D. shouldn’t
23. John did quite well in his exams, how little he studied.
A. consider B. considering C. considered D. to consider
22. A library with five thousand books ______ to the nation as a gift.
A. is offered B. has offered C. are offered D. have offered
第一节:单项填空 (共15小题;每小题1分,满分15分)
21. The education of young is always hot and serious topic in China.
A. /; a B. the; a C. /; the D. the; /
第二节 听下面5段对话或独白。每段对话或独白后有几个小题,选出最佳选项。每段对话或独白读两遍。
听下面一段材料,回答第6至7题。
6. What is the woman’s problem?
A. She hasn’t got a train ticket. B. She can’t find her luggage. C. She can’t catch the train.
7. Who is the woman probably talking to?
A. A taxi driver. B. A railway clerk. C. A hotel manager.
听下面一段材料,回答第8至10题。
8. What is the girl’s problem with her parents?
A. They treat her in old ways. B. They praise her too often. C. They never stay with her.
9. What do we know about the boy and his parents?
A. They never trust him. B. They seldom agree with him. C. They worry too much about him.
10. What can we learn from the conversation?
A. There are differences between generations.
B. No parents get on well with their parents.
C. Most children are tired of their parents.
听下面一段材料,回答第11至13题。
11. What did the man think of the film?
A. It’s very good. B. It’s very bad. C. It’s neither good nor bad.
12. Where did the couple in the film live?
A. In their own house. B. With the husband’s mother. C. With the wife’s mother.
13. What happened to the couple in the film in the end?
A. They bought a house of their own.
B. They continued to live with the husband’s mother.
C. They needn’t work any more.
听下面一段材料,回答第14至16题。
14. When does the man eat fast food?
A. On workdays. B. On weekends. C. Every day.
15. What does the man think of fast food?
A. It’s his favourite. B. It needs improving. C. It tastes bad.
16. What kind of food is NOT mentioned in the conversation?
A. Hamburgers. B. Sandwiches. C. Eggs.
听下面一段材料,回答第17至20题。
17. What’s the passage mainly about?
A. Air pollution outside. B. Indoor air pollution. C. The disease caused by the polluted air.
18. Where did some of the worst indoor air pollution happen?
A. In most developing countries.
B. In a few developed countries.
C. In developing countries where people used wood and coal to cook.
19. How many diseases could be caused by breath in harmful indoor air according to the passage?
A. 5. B. 6. C. 7.
20. What would be probably talked about next?
A. Problems of indoor air pollution.
B. Ways to solve the problem of indoor air pollution.
C. Causes of indoor air pollution.
第一节 听下面5段对话。每段对话后有一个小题,选出最佳选项。每段对话仅读一遍。
1. What is the woman doing?
A. Making suggestions. B. Making excuses. C. Making requests.
2. What does the man say about Mary?
A. She seldom works. B. She enjoys working at the same job.
C. She often changes her job.
3. How is the woman’s health according to the doctor?
A. She’s healthy. B. She’ll be all right soon. C. She’s often sick, but not serious.
4. How long does it take the woman to drive home when there’s not much traffic ?
A. 20 minutes. B. 25 minutes. C. 50 minutes.
5. What is the weather like in Scotland in December?
A. Warm. B. Cold. C. Hot.
34、请分析回答下列有关DNA复制方式和人类遗传病的有关问题:
Ⅰ关于DNA复制方式的实验:
为探讨DNA分子的复制是半保留复制(每个子代DNA都有一条母链和一条新合成的子链形成)、全保留复制(子代DNA分子一个由两条母链组成,一个由两条子链组成)还是随机组合复制(子代DNA分子子链片段和母链片段随机出现)。科学家设计了如下实验:
(1)在只含15N的培养基中连续培养大肠杆菌,目的是获得 亲代大肠杆菌。
(2)将亲代大肠杆菌转移到只含14N的培养基培养,测定子代DNA分子的放射性组成。如果子一代DNA,一个只含14N,一个只含15N,说明DNA分子的复制方式是 ;如果子一代两个DNA都既含14N、又含15N,则应继续观察子二代DNA组成:若子二代DNA全部都是既含14N、又含15N,说明DNA分子的复制方式是 ;若子二代DNA ,则说明DNA分子的复制方式是 。
Ⅱ右图是一个遗传病的家系遗传图谱。该遗传病在人群中的发病率是1/10000。
(1)该遗传病的遗传方式是 。
(2)在遗传病研究中,通过 判断遗传方式,通过 确定发病率。
(3)9和10婚配,生出遗传病孩子的概率是 ;9号与没有亲缘关系的正常女性婚配,生出遗传病孩子的概率是 。
33.对水稻中一个矮杆粳稻和一个高秆糯稻品种分别做以下检查:各取其花粉样品,滴一滴碘液,分别在显微镜下观察,发现矮秆粳稻的花粉全部被染成蓝黑色,高秆糯稻的花粉全部被染成红褐色。以这两个品种的水稻作为亲本进行杂交实验。结果如下:
①F1全部是粳稻。
②F1种下去全部长成高秆。
③F1抽穗开花,取其花粉样品,滴碘液,在显微镜下观察,发现约1/2花粉被染成蓝黑色,1/2被染成红褐色。
根据以上事实,回答下列问题:(不考虑基因突变)
(1)糯稻和粳稻是一对相对性状, 是显性性状;在水稻杆的高度这一相对性状中, 是隐性性状。
(2)F1中花粉被碘液染色后,1/2花粉被染成蓝黑色,1/2被染成红褐色的原因是减数分裂形成配子时, 。这符合基因的 规律。
进一步观察、统计发现:④F2中,约3/4为粳稻,1/4为糯稻。不管粳稻还是糯稻,长成的植株都约有3/4高秆,1/4矮秆。
(3)根据上面的①②③④4项实验结论,请提出恰当的假说:
a.控制水稻淀粉性质(粳稻和糯稻)的基因与控制水稻杆高度(高杆和矮杆)基因位于 对同源染色体上。
b.减数分裂形成配子时,两对基因 ,独立地随配子遗传给后代。
(4)为验证假说是否正确,可以用 和 杂交,观察后代的性状表现及分离比。若后代出现 种类型且分离比等于 ,说明假说成立;否则,假说不成立。
32.下列四图表示体细胞含有4条染色体的某一个高等生物的几个细胞。依图回答:
(1)如果A、B、C、D四个图解是在某一器官中连续发生的四个阶段。该该器官的名称是 ,四个图像出现的顺序是 ,A称为 细胞。
(2)上图中有两个染色体的细胞有 ,存在同源染色体的细胞有 ,有染色单体的细胞有 。
(3)在学习了无籽西瓜培育后,有同学为探究秋水仙素是否能够引起动物细胞染色体数目的加倍,设计了下面的实验步骤:
①用胰蛋白酶处理幼年动物的组织,获得具有旺盛分裂能力的细胞悬液;
②对两组培养皿分别编号为甲组和乙组,在甲、乙两组中加入等量的动物细胞培养液。然后在甲组滴加5滴适宜浓度秋水仙素溶液并混合均匀;乙组滴加等量的 并混合均匀;在两个培养皿中接种等量的细胞悬液后,把两组培养液同时放入适宜条件下培养。
③选取两培养皿中培养一段时间的细胞制成装片,观察装片中细胞染色体数目的变化。
他应该观察什么时期的细胞进行观察比较?
若 ,说明秋水仙素能够诱导动物细胞染色体加倍。
若 ,说明秋水仙素不能诱导动物细胞染色体加倍。
31.请结合遗传与进化的内容回答下列问题:
(1)对于真核生物来讲,遗传信息指 ;遗传密码指 ;外显子指 。
(2)在DNA分子复制过程中,与胸腺嘧啶配对的单位是 ;在DNA转录过程中,与胸腺嘧啶配对的单位是 。
(3)遗传规律发生的时期是 时期,遗传规律的研究对象是 。
(4)生物进化的基本单位是 ,生物进化的实质是 ,能够用显微镜观测的可遗传变异是 。
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