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Some scientists think there are 2.000 million flashes of lightning per year. A.i

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Some scientists think there are 2.000 million flashes of lightning per year. A.i

Some scientists think there are _______ 2,000 million flashes oflightning per year.

A.in short

B.on average

C.as usual

D.in total

 

试题答案

【答案】

B

【解析】

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