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问题 选择题

Careful! Or you will __ the car.[ ]

A. turn    

B. turn into    

C. turn over    

D. turn on

答案

答案：C

单项选择题

The advantage of geostationary satellites is（）.

A.the range of antenna can cover everywhere in the world

B.we can know the ship’s exact position

C.that the distress alert can be located as soon as possible

D.antenna of permanent earth stations may be directed towards fixed points in the sky
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单项选择题 A1型题

下丘脑与腺垂体之间主要通过下列途径联系（）

A.脑脊液

B.门静脉系统

C.神经纤维

D.垂体门脉系统
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