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举一反三
【单选题】下列关于抛射剂的叙述错误的是
A.
抛射剂可分为压缩气体与液化气体
B.
压缩气体常用作喷雾剂动力
C.
抛射剂在气雾剂中起动力作用
D.
抛射剂可兼作药物的溶剂或稀释剂
E.
气雾剂喷雾粒子大小、干湿与抛射剂用量无关
【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.