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关于毒品的概念，国内与国外是统一的。 ()

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按照毒品对人体毒性的危害进行分类，海洛因和苯丙胺类属于软性毒品。 ()

The old man is very pleased to be told that his daughters and son-in-laws are going to see

以鸦片为原料,可提取的合法药品有()
A吗啡
B罂粟壳
C可待因
D蒂巴因

Even before the human organism developed into their present stage of Homo sapiens, the beginnings of culture were already evident.