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问题 单项选择题 A1/A2型题

免疫组织化学染色的基本原理是（）

A.补体间的反应

B.抗原与抗体间的特异性反应

C.受体与配体间的特异性反应

D.抗原与抗原间的反应

E.抗体与抗体间的反应

答案

参考答案：B

单项选择题 A1型题

下列哪条不是生活饮用水质卫生标准的制订原则（）

A.流行病学上安全

B.保证水的感官性状良好

C.水中所含化学物对健康无害

D.保证自净过程的正常进行

E.经济和技术上可行
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句型转换

按要求完成下列各句。

1. His mother doesn't allow him to get his ears pierced.(改为被动语态)

    He _____to get his ears pierced.

2. He thinks he can pass the exam.(改为否定句)

    He _____think he_____ pass the exam.

3. I don't think sixteen-year-olds should be allowed to drive.(改为反意疑问句)

    I don't think sixteen-year-olds should be allowed to drive, _____ ?

4. Alice is too young to go to school.(改为同义句)

    Alice isn't _____to go to school.

5. Nobody can answer the question.(改为被动语态)

    The question_____ answered by anybody.
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