下载APP
【单选题】
干粉灭火剂是由具有灭火效能的（）和少量的添加剂经干燥、粉碎、混合而成的微细固体粉末组成。
A.
碳酸钙
B.
无机盐
C.
碳酸氢钾
D.
碳酸氢钙
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.