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- 2Every man in this country has the right to live where he wants to,_______the color of his skin.
- 3某烷烃含有200个氢原子,那么该烃的分子式是( ) A.C99H200 B.C98H200 C.C97H200 D.C96H200
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- 9有甲乙两个数,甲数的四分之三等于乙数的十二分之五,甲数的五分之二比乙数的十二分之一多45,
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