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【单选题】

为改善和稳定钻井液性能而加入钻井液中的化学添加剂叫()。

A.
处理剂
B.
加重剂
C.
润滑剂
D.
重晶石粉
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参考答案:
参考解析:
.
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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.

【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