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单选题

Question 18 is based on the passage you have just heard.

A
To find out the strength of silk for kites.
B
To test the effects of the lightning rod.
C
To prove that lightning is electricity.
D
To protect houses against lightning.
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答案:

C

解析:

(18). Why did Benjamin Franklin fly a kite in the storm?

解析:文中提到本杰明放风筝是为了证明闪电是一种电流,与C项对应,而B项虽有提到避雷针,但是是说避雷针因实验而被促进发明出来,D项虽然明显可以看出是避雷针的作用,但原文并未提及,所以切忌想当然,最后根据问题确认答案为C。

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