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问题 单项选择题

提出抗体形成的克隆选择学说的学者为()

A．Jerne

B．Burnet

C．Medawar

D．Ehrlich

E．Behring

答案

参考答案：B

名词解释

结构面的线密度K（裂隙度）
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问答题

Instruction:
Write an essay in around 300 English words on the following subject:
What Is a Good Translator
What are, in your opinion, the 3 basic qualifications a good translator should have Give your reasons. Your essay should consist of a lead-in paragraph, a concluding one and the body.
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