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填空题正确答案是__________。

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factory/factories

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2阅读下列材料,回答题。



阅读部分第1题:The main topic discussed in the text is
A the damage caused to US golf courses and golf players by lightning strikes.
B the effect of lightning on power supplies in the US and in Japan.
C a variety of methods used in trying to control lightning strikes.
D a laser technique used in trying to control lightning strikes.