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问题 单项选择题

通常情况下在保证较高塔板效率的前提下，力求（），以降低能耗及改善塔的操作性能。

A、增大塔板压力降

B、减少塔板压力降

C、提高空塔气速

D、增加塔盘数

答案

参考答案：C

阅读理解

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     It is Saturday. The Browns are at home. Mrs. Brown is in the kitchen. She's making apple pies. The pies she makes are very delicious. Do you want to have a taste? Mr. Brown isn't in the living room. He is outside. He is washing his car. The car is new and very beautiful. So he looks after it very well. Jim is in the garden. He is playing football with some other boys. Where is his sister, Sue? She's in her bedroom with her friend, Ann. They are watching the Animal World.

1. There are ______ people in Mr. Brown's family.   

A. six

B. four

C. two

D. three

2. Mrs. Brown is ______.

A. tasting the apple pies

B. watching TV

C. cooking

C. eating a cake

3. Mr. Brown looks after ______ very well.

A. Mrs. Brown        

B. his daughter

C. his family      

D. his car

4. Who are playing outside? ______.

A. Mrs. Brown and Sue

B. Some boys

C. Sue and Ann  

D. Some girls

5. Sue and Ann are ______.

A. watching TV in the living room    

B. playing football in the open air

C. watching TV in Sue's room                

D. playing in Ann 's room
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单项选择题

有关冠状面的叙述，错误的是

A．与地面垂直

B．与矢状而垂直

C．将人体左右等分

D．与人体水平面垂直

E．将人体分为前后两部分
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