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【单选题】

润滑油中,()添加剂具有增加润滑油的粘度及改善润滑油的粘温性。

A.
增粘
B.
抗凝
C.
抗腐
D.
抗磨
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参考答案:
参考解析:
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刷刷题刷刷变学霸
举一反三

【单选题】在 的情况下,滑动轴承润滑油的粘度不应选得较高。

A.
重载
B.
高速
C.
工作温度高
D.
承受变载荷活振动冲击载荷

【单选题】测定润滑油机械杂质的苯废液应()。

A.
倒入水池中
B.
倒入封闭容器中,进行回收
C.
倒入废液罐中
D.
倒入废油中

【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.

【多选题】给水泵润滑油进水的原因有()

A.
轴封漏汽进入轴承内
B.
冷油器内部泄漏
C.
油侧压力大于水侧压力

【多选题】下列属于食品添加剂的是()。

A.
防腐剂
B.
酸味剂
C.
漂白剂
D.
凝固剂