现代民用运输机为了利用机身空间，机翼一般采用：（）.A.双层机_爱下问搜题

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问题单项选择题

现代民用运输机为了利用机身空间，机翼一般采用：（）.

A.双层机翼

B.半悬臂机翼

C.中单翼

D.上单翼或下单翼

答案

参考答案：D

填空题

从方框中选择适当的选项填人短文中,使短文通顺、完整.选项中有两个选项是多余选项。

A. get B. excited C. but D. what E. some F. die
G. into H. tries I. much J. note K. heart L. and

      A man is traveling in the desert and loses his way.
     He has no water to drink and thinks he will l. _________. After walking for two days, he finds an
old wooden house. He enters the house, and finds a water pump(泵).  He is very 2. _________and
goes to pump some water,  but no water comes out. He loses 3._________, and sits on the ground.
Then he sees a bottle near the water pump.  It's full of water and there is a 4._________ on it.  It says,
  "You must put the water of the bottle into the water pump to 5. _________water out.  Don't forget to
fill this bottle when you leave. "
     He looks at the bottle of water, and can't decide 6. _________to do.  If he drinks the water,  he
may be able to survive in the desert for a while,  7. _________if he puts the water into the water pump,
he may get enough water to help him get out of the desert or get nothing. Finally, he puts the whole bottle
of water 8._________the water pump. He again 9. _________to pump water out,  and this time plenty
of water comes out.  He drinks as 10._________as he can, and then fills the bottle with water again.
     A few days later, he walks out of the desert.

问答题简答题

编制应急预案应做好哪些准备工作？