• 2022-06-19
    Preventive medicine is composed by three levels, i.e. primary prevention, secondary prevention and tertiary prevention.
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      disease prevention

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      Prevention of avian coccidiosis could be achieved by drug prevention and vaccine immunization. A: 正确 B: 错误

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      未雨绸缪,防患于未然。? Prevention|Repair the window before it rains.|Prevention first.|Repair the window after it rains.

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      在PubMed中检索肺癌的预防或治疗的相关文献,检索策略应为 A: Lung cancer AND Prevention AND therapy B: Prevention OR therapy AND Lung cancer C: Prevention AND therapy OR Lung cancer D: Lung cancer AND Prevention OR therapy

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      Which is the pollution prevention equipment?