第17题: [单项选择]举办中外合资经营企业，属于国家规定鼓励和允许投资项目的，合营各方 ( )合营期限。 A. 应该约定 B. 必须约定 C. 可以约定，也可以不约定 D. 不应该约定 参考答案:C 答案解析:[大纲要求] 熟悉
[习题解析] 本题考查重点是对“中外合资经营企业的合营期限”的熟悉。举办中外合资经营企业，属于国家规定鼓励和允许投资项目的合营各方可以在合同中约定合营期限，也可以不约定合营期限
第30题: [单项选择]细胞固定化技术与酶固定化技术相比，所具备的特点是（） A. 成本更低、操作更容易，不能连续性生产 B. 成本更高、操作更难，不能连续性生产 C. 成本更低、操作更容易，能连续性生产 D. 成本更低、操作更难，能连续性生产 参考答案:C 答案解析:酶是由细胞合成的，酶分子很小，比较难固定，而细胞相对较大，相对容易固定，而且无需再进行酶的提取，因而固定化细胞制备的成本更低，操作更容易，并且能连续生产。
第32题: [简答题]请设计一节课的教案，达到以下目的。 1．学生通过对例文的学习能够写作thank you letter。 2．培养学生运用英语的能力。 参考答案:
Teaching plan(one possible version)：
Step A．Warming up
Lead in．Writing a thank you letter conveys someone’s politeness or good manners，so when we receive others’ help or gifts，we should write them a thank you letter．
Step B．Reading
A．Scanning
(A)Ask students to read the text quickly，and then answer this question：
Why does Amy Zhang thank Sam and Jenny
(B)Ask one student to answer this question．
B．Carefully reading
(A)Ask students to listen to the tape，and imitate the intonation．
(B)Explain language points：(some important phrases and sentence structures)
think of: ①考虑，关心 ②想起，记得 ③想一想，想象
Example: I thought of my hometown when I saw the beautiful scenery.
be busy with: 忙于做
Example: I am busy with drawing from Monday to Friday.
It is time to: 是时间做(注意与it is time that... 的区别)
Example: It is time to go to bed.
After explanation, finish the exercises.
Structure of a thank you letter
Paragraph A: Thank the people for what they did for you. Give some details about what you liked.
Paragraph B: Tell the people something about yourself and the things you are doing now.
Paragraph C: Ask the people some details about themselves and what they are doing now. Close the letter by repeating your thanks.
Step C. Homework
Write a thank you letter. Pay more attention to the structure of the thank you letter
