9. When did the woman see Rata ?

A. Two or several days ago .　　 　 B. A week ago. 　　　 C. Two weeks ago.

8. What can we learn from the conversation ?

A. People in town throw rubbish everywhere .

B. Another rubbish plant will be set up in town. 　　　　　　　 　　

C. The plant can deal with much rubbish every day.

听第7段材料，回答第9至11题。

7. Which description is RIGHT according to the talk ?

A. There is only one way to deal with the rubbish and the waste .　

B. There are many ways to deal with the rubbish and the waste .

C. People are engaged in working out dealing ways.

6. Where is the plant being built ?

A. Near the town. 　　　 　　B. Far from the town .　　 C. North of the town.

4. How does the man think the woman plays the violin ?

A.Worse than he.　　　　　　 B. Better than he. 　　 　C. As well as he.

3. What’s the man’s job ?

A.Shop assistant. 　　　　　 B. Tailor. 　　 　　　C. Repair man.

2. Whom are they talking about ?

A. A pretty girl.　　　　　　 B. An unknown man.　　　 C. A schoolmate.

54.(9分)从某种真核细胞中提取出大量核糖体，放入含有下列几种有机物(其中的氮原子已被¹⁵N标记)的培养液里，假设培养液里含有核糖体完成其功能所需的一切物质和条件。

①NH₂-CH₂-COOH　　　　　　　　 ②NH₂-CH₂-CH₂OH

③NH₂-CH₂-CH-CH₃　　　　　　　 ④NH₂-CH-CH₂-COOH

⑤NH₂-CH-(CH₂) ₄-NH₂

请回答：

⑴实验中，核糖体所需要完成的功能就是把上述物质中的［　　 ］(填号码)　　　 ，通过　 　　　方式合成多肽(蛋白质)。

⑵实验中所用的培养液相当于细胞内的__________________。

⑶上述有机物(每种只取一个)合成的直链多肽含有________个氨基和________个羧基，称为________肽，合成的直链多肽可能有________种。

⑷实验中，检测到某一直链多肽含20个¹⁵N，则该多肽最多有________个肽键。

贵州省乌沙中学09-10学年高三上学期期中考试