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【单选题】

液体添加剂系统的计量泵在长期不用时,可在泵腔中注入(),防止定子、转子粘结锁死

A.
清水
B.
柴油
C.
润滑油
D.
润滑脂
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参考解析:
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刷刷题刷刷变学霸
举一反三

【单选题】若将局部麻醉药物注入血管中可发生()

A.
药物过敏
B.
药物中毒
C.
晕厥
D.
血管扩张伤口出血
E.
中枢神经麻痹

【单选题】二厂使用的计量泵属于( )

A.
往复隔膜式
B.
回转柱塞式
C.
往复柱塞式
D.
回转隔膜式

【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】()计量泵不是根据液力端结构分类的。

A.
机械隔膜计量泵
B.
液压隔膜计量泵
C.
柱塞计量泵
D.
直动计量泵

【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