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国际上第一个人体试验的伦理文献是A.《赫尔辛基宣言》B.《医.....
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There has been a growing body of evidence to suggest that global warming is worsening and ..
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"To tell the truth is not always essential. On some occasion it is necessary to tell lies ..
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在北京周口店出土的猿人牙齿和石器,是迄今发现最早的人类化石。..
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男,25岁,右膝关节和左足跟肿痛4周,曾有下半夜腰痛病史4年.....
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It is I that is in charge of the project sponsored by the government...
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