谁能够证明脑癌潜伏期是20年?
回答: 请看上面cnn录像,它说手机在美国流行也就15年,而脑癌潜伏期可以是20年。香烟致癌的结论用了长达200年。肺癌的潜伏期可高达3
由 swj2000
于 2014-10-21 14:56:37
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