[问题] 问一题化学

楼主: joseph871012 (zxc1478)   2016-07-17 01:10:39
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作者: candysagaboy (糖果男孩)   2016-07-17 12:15:00
38=2X19 57=3X19 76=4X19 =>19 =>答案(D)

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