In the ginseng trial the researchers tested the potency of

In the ginseng trial the researchers tested the potency of ginseng__________A.t

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The police contended that the difficulties they faced were

The police contended that the difficulties they faced were too severe.A.argued

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将乙胺丁醇与链霉素合用治疗结核病的目的是

将乙胺丁醇与链霉素合用治疗结核病的目的是A.延长链霉素作用时间 B.有利于药物进入结核感染病灶 C.阻止或延迟结核杆菌对链霉素产生耐药性 D.延迟肾脏排泄链霉素

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甲氧苄啶的抗菌机制是

甲氧苄啶的抗菌机制是A.破坏细菌细胞壁 B.抑制二氢蝶酸合成酶 C.抑制二氢叶酸还原酶 D.抑制DNA螺旋酶 E.改变细菌细胞浆膜通透性

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