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【简答题】

原油在送蒸馏装置之前要加注新鲜水和两种添加剂:破乳剂和脱钙剂。请问加这三种物质对原油起什么作用?

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参考解析:
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举一反三

【单选题】蒸馏装置中,温度计水银球上部应位于何处()。

A.
蒸馏烧瓶支管底部的水平面上
B.
蒸馏瓶支管口上方
C.
蒸馏瓶底2厘米处
D.
蒸馏液中部
E.
蒸馏瓶底部

【单选题】常减压蒸馏装置原油注碱的目的是()。

A.
提高脱盐率
B.
中和原油中的盐
C.
中和原油中的环烷酸
D.
提高处理量

【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
相关题目:
【单选题】蒸馏装置中,温度计水银球上部应位于何处()。
A.
蒸馏烧瓶支管底部的水平面上
B.
蒸馏瓶支管口上方
C.
蒸馏瓶底2厘米处
D.
蒸馏液中部
E.
蒸馏瓶底部
【单选题】常减压蒸馏装置原油注碱的目的是()。
A.
提高脱盐率
B.
中和原油中的盐
C.
中和原油中的环烷酸
D.
提高处理量
【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