2. 外语
  3. Smart dust sensors can do all the following EXCEPT ______. By "physical environment" (Line 2, Paragraph 2), the writer means su

Smart dust sensors can do all the following EXCEPT ______. By "physical environment" (Line 2, Paragraph 2), the writer means su

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问题 Smart dust sensors can do all the following EXCEPT ______.
By "physical environment" (Line 2, Paragraph 2), the writer means such elements as ______.
选项 A、the position of military troops
B、the presence of minicomputers
C、the strength of radio signals
D、the amount of water vapor in the air
答案D
解析 “elements such as temperature，moisture，humidity，pressure，energy use，vibration， light，motion，radiation，gas，and chemicals”中有气体，所以选D。本题也属于细节题，只要回到原文找到正确的对应就可以了。
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