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问题 单项选择题

在VISCOCHIEF型燃油粘度控制系统中，燃用重油（HFO）的控制方式比燃用柴油（DO）的控制方式增加了（）。

A.温度定值控制

B.粘度定值控制

C.温度程序控制

D.粘度程序控制

答案

参考答案：B

改错题

短文改错

     Recently, my classmates have had a heated discussion about if we should have optional courses

(选修课) in high schools. Some students were  in favor of optional courses. They say interest is best

teacher and  our spare time will be colorful and meaningful. Students can not only  enlarge their

knowledges but also improve their abilities.  However, others are against the idea, said that optional

courses will take up too much time as well as energy. Besides, some optional courses have something

to do with the College Entrance Examination. They are afraid they'll fall behind their classmates if they

will take optional courses. I'd like to take one or two  of the optional courses, which, I think, will certain

benefit me  lot.

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多项选择题

未破卵泡黄素化综合征患者无以下哪些表现（）

A.无排卵，基础体温单相，无受孕可能

B.有排卵，基础体温双相，无受孕可能

C.有排卵，基础体温单相，无受孕可能

D.有排卵，基础体温双相，有受孕可能

E.无排卵，基础体温双相，子宫内膜分泌期
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