填空题
The passage mainly aims to identify that nanotech may do potential damage to our health and environment.
【参考答案】
N
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问答题
简单介绍自己并说明该启事和目的2. 给出人选的条件3. 提供你的联系方式 A Notice of Exchange
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单项选择题
A.forB.withC.overD.towards
A.for
B.with
C.over
D.towards
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