Which of the following uses of nanotechnology is NOT mentioned in the passage? The following developing countries are doing ver

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问题 Which of the following uses of nanotechnology is NOT mentioned in the passage?
The following developing countries are doing very well scientific research on nanotechnology EXCEPT ______.

选项 A、China
B、Brazil
C、Iran
D、India

答案C

解析 第五段第二句已经说得很清楚,其中并没有Iran。
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