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  3. The passage mainly aims to identify that nanotech may do potential damage to our health and environment. According to scientist

The passage mainly aims to identify that nanotech may do potential damage to our health and environment. According to scientist

admin2012-12-13  43
问题 The passage mainly aims to identify that nanotech may do potential damage to our health and environment.
According to scientists possible threat from nanomaterials may cause some severe problems.
选项 A、Y
B、N
C、NG
答案B
解析 由题干threat from nanomaterials可定位至第三段末句，该句提到科学家认为纳米材料的潜在威胁比起恐怖小说描述的场景要平常得多，但其严重程度开不亚于那些场景(no less serious)，故本题错误。
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大学英语四级

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