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问题 选择题

下列关于单克隆抗体的应用的说法中，不正确的是  [ ]

A．可以准确地识别抗原

B．可以用于治疗癌症

C．可以制成“生物导弹”

D．单克隆抗体的缺陷是不能大量制备

答案

答案：D

简答题

判断下列说法正确与否，并对错误的加以改正。

青少年要善于用智慧保护自己。

判断：_________________________________________________________________________

理由：_________________________________________________________________________
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填空题

用适当的介词填空。

1. They are staying there _____ three weeks.

2. She is leaving _____ June 15th.

3. What are they doing _____ vacation?

4. Alice is going camping _____ her classmates.

5. They are buy working now.  How _____ you?
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