题目内容
【题目】Isaac Newton was the first person to_______ why apples fall . ( )
A. findB. lookC. look outD. find out
【答案】D
【解析】
略
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题目内容
【题目】Isaac Newton was the first person to_______ why apples fall . ( )
A. findB. lookC. look outD. find out
【答案】D
【解析】
略