试题与答案

装有恒速螺旋桨的活塞収动机飞机在起飞后迚行爬升,为将収动机的起飞功率减至爬升功率,除

题型:单项选择题

题目:

装有恒速螺旋桨的活塞収动机飞机在起飞后迚行爬升,为将収动机的起飞功率减至爬升功率,除减小迚气压力外还应?()

A.通过减小桨叶角增加发动机的转速

B.通过减小桨叶角减小发动机的转速

C.通过增加桨叶角减小发动机的转速

答案:

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A. Seeing eye dogs are cute.

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D. When the light is green.

5. Which of these sentences is true?

A. All blind people have seeing eye dogs.

B. In the street, blind people have many dangers to avoid.

C. It's fine to pet seeing eye dogs.

D. There is no safe way to cross the street.

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