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【单选题】
某乡镇对集贸市场36种食品进行检查，发现超过保质期的7种，防腐添加剂不合格的9种，产品外包装标识不规范的6种。其中，两项同时不合格的5种，三项同时不合格的2种。问三项全部合格的食品有多少种？______
A.
14
B.
21
C.
23
D.
32
参考答案：
参考解析：
刷刷题刷刷变学霸
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.