轻质油品在低温下能呈现浑浊和析出结晶的原因，主要是油品中存有

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问题单项选择题

轻质油品在低温下能呈现浑浊和析出结晶的原因，主要是油品中存有低温下能结晶的固态烃类和（）。

A、溶解氧

B、溶解水

C、二氧化碳

D、非烃类化合物

答案

参考答案：B

选择题

Realizing that everything she said had no effect on her son, __________.

A．her son’s teacher was asked to help solve the problem.

B．it was decided that her son’s teacher should help solve the problem.

C．She had to ask her son’s teacher to help solve the problem

D．there’s nothing she can do but ask her son’s teacher to help solve the problem.

单项选择题

下列叙述哪一项说法是错误的（）

A.麻黄清表热

B.石膏清里热

C.秦艽清虚热

D.银花透表热，清里热

E.丹皮清血热、退虚热