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举一反三
【单选题】熔点是以下哪个？（）
A.
液体药物的物理性质
B.
不加供试品的情况下，按样品测定方法，同法操作
C.
用对照品代替样品同法操作
D.
用作药物的鉴别，也可反映药物的纯度
E.
可用于药物的鉴别、检查和含量测定
【单选题】Many Americans harbor a grossly distorted and exaggerated view of most of the risks surrounding food．Fergus Clydesdale, head of the department of food science and nutrition at the University of Massac...
A.
They overlook the risks of the food they eat.
B.
They overestimate the hazards of their food.
C.
They are overoptimistic about the safety of their food.
D.
They overstate the government's interference with the food industry.