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是红霉素6位羟基的衍生物,在胃中稳定,对支原体和衣原体均有.....
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Preliminary estimation puts the figure at around $ 10 billion, ______the $ 160 billion the..
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Please restrain yourself from smoking and spitting in public places, since the law______th..
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地区差异引起贸易。()..
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属广谱的酶抑制剂,与抗生素同时服用可减小其耐药性的是A.舒.....
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三相线路断开相将造成三相设备不对称运行,可能烧坏设备。()..
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