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参考答案：
参考解析：
刷刷题刷刷变学霸
举一反三
【单选题】能使补体而不能使抗体灭活的温度和作用时间是（）
A.
37℃，60min
B.
60℃，30min
C.
45℃，30min
D.
56℃，30min
E.
80℃，30min
【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】下列有关气体灭火系统组件设置要求的说法，不正确的是( )
A.
容器阀和集流管之间应采用挠性连接
B.
选择阀的公称直径应与其所在防护区灭火系统的主管道公称直径相等，并应靠近防护区设置
C.
管网灭火系统的储存装置宜设在专用储瓶间内，储瓶间的环境温度应为 -10℃ ~50℃
D.
在粉尘、油雾场所设置气体喷头时，喷头应有防护装置