单选题：It can be inferred that the author__________

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题目内容：
It can be inferred that the author__________ A．is a radical environmentalist
B．is an environmental pessimist
C．is trying to save the world sincerely
D．knows something about systems engineering

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答案解析：

Richard Seed claimed to be able to clone__________

Richard Seed claimed to be able to clone__________A．the nucleus of a cell B．clon

分类：理工类  题型：单选题
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请在第__(55)__处填上正确答案。

请在第__(55)__处填上正确答案。A．rational B．physiological C．divine D．intellectual

分类：理工类  题型：单选题
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Paragraph 6__________

Paragraph 6__________A．Nuclear reactions as the lasting source of the sun's ener

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The smog spread to neighbouring countries.

The smog spread to neighbouring countries.A．Right B．Wrong C．Not mentioned

分类：理工类  题型：单选题
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