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【判断题】
冷却液添加剂比例至少占 40 %（防冻能力至 -25 °C），但不超过 60 %（防冻能力至 -40 °C）冷却液添加剂比例至少占 40 %（防冻能力至 -25 °C），但不超过 60 %（防冻能力至 -40 °C）
A.
正确
B.
错误
举报
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.
【单选题】数控系统除位置控制功能外，还需要主轴起/停、换刀、冷却液开/停等辅助控制功能。这部分功能一般由（ ）实现。
A.
数控装置
B.
PMC
C.
检测装置
D.
输入/输出装置