第一节  听力理解(5段共15小题;每小题2分, 满分30分)

每段播放两遍。各段后有几个小题, 各段播放前每小题有5秒钟的阅题时间。请根据各段播放内容及其相关小题, 在5秒钟内从题中所给的A、B、C项中, 选出最佳选项, 并在答题卡上将该项涂黑。

听第一段对话,回答第1-3题。

1.  What’s the relationship between the two speakers?

A.  Reporter and interviewee.

B.  Husband and wife.

C.  Teacher and student.

2.  What does Peter usually do at weekends?

A.  Enjoy an outing.

B.  Have a rest at home.

C.  Learn how to play the piano.

3.  What does the woman mean at last?

A.  She doesn’t want to go with Smith.

B.  They will invite Smith to the outing.

C.  Smith won’t accept their invitation.

听第二段对话,回答第4-6题。

4.  What’s the symbol of transportation to most Americans?

A. Cars.  B. Buses.  C. Driving licenses.

5. What can we know about the woman?

   A. She started driving at 16.

   B. Her brothers taught her to drive.

   C. Her hometown is too poor to have a bus.

6. How many kinds of transportation are mentioned?

   A. One.   B. Two.   C. Three.

听第三段独白,回答第7-9题.

7. Which of the following statements about Shenzhen is CORRECT?

   A. It has more than 6,000 design companies.

   B. In 2005, its GDP was US$1.9 billion.

   C. Bird’s Nest was designed by a Shenzhen designer.

8. What have Shenzhen’s designers achieved?

   A. They’ve built many schools of design.

   B. They’ve held many competitions.

   C. They’ve won many prizes.

9. What happens to foreign designers in Shenzhen?

   A. They all have their own workshops.

   B. They cooperate with local designers.

   C. They are doing better jobs than local designers.

听第四段对话,回答第10-12题.

10. What are the speakers mainly talking about?

   A. The responsibilities for the woman’s position.

   B. The woman’s arrangement for a day.

   C. The relationship between the two speakers.

11. What is the probable position of the woman?

   A. President of a factory.

   B. Newswoman of a TV station.

   C. Manager of a business club.

12. What will the woman probably be doing at 7:10 pm?

   A. Having the monthly meeting.

   B. Being interviewed for a TV program.

   C. Writing the speech for the dinner meeting.

听第五段对话,回答第13-15题.

13. Where does the conversation take place?

   A. At a newspaper stand.

   B. In a housekeeping center.  

   C. At a hotel.

14. What’s wrong with the air conditioner?

   A. It won’t start.  B. It’s making a noise. C. It doesn’t work at all.

15. Which service is offered?

   A. Sending mails to the room.

   B. Washing and ironing clothes.

   C. Delivering magazines.

44.(12分)下列甲图表示洋葱根尖的不同区域;乙图表示洋葱根尖处于有丝分裂各阶段细胞核中DNA和细胞质中mRNA含量变化;丙图呈现的是细胞分裂过程中的一种物质变化和形态变化。请分析回答下列问题:

(1)在放射性同位素标记研究中,为区别DNA和RNA,最好选择标记的合成原料分别是                、                 

甲
 
。

(2)进行分裂的细胞集中在甲图中的[③]       。该区域的细胞中能产生ATP的细胞器有        。

(3)研究表明细胞的呼吸速率在各时期是不同的,乙图中c阶段后期耗氧最多,这与分裂期需要大量的      相适应。c阶段细胞核DNA、染色体与染色单体的比例为          ,这种比例将维持到细胞有丝分裂的   期才可能开始变化。

(4)乙图表明细胞分裂过程中核糖体功能较活跃的时期是     (填字母),这也说明在上述时期进行了大量       的合成。

(5)丙图呈现了一种物质变化和形态变化过程,①→②的物质变化对应于乙图中的时期是    (填字母);②→③的形态变化对应于乙图中的时期是     (填字母)。

(6)在观察有丝分裂实验时,我们发现即使操作正确,也难以看到很多处于分裂期的细胞,主要原因是                           。

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