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举一反三
【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.
【单选题】铝电解电容和钽电解电容的区别（）
A.
铝电解电容体积小、容量大、寿命短
B.
铝电解电容体积小、容量大、寿命长
C.
铝电解电容和钽电解电容各个参数、性能都相同，都是有极性电容
D.
铝电解电容有极性，钽电解电容无极性