题目内容

词汇与结构The cabin air control can be opened to _______ smoke and fumes.

A. evacuate
B. remove
C. extinguish
D. replace

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词汇与结构A fire or smoke in the cabin should be controlled by identifying and _______ the faulty system.

A. engaging
B. removing
C. shutting down
D. activating

词汇与结构If smoke increases in _______ when the cabin air vents are opened, they should be immediately closed.

A. visibility
B. intensity
C. stability
D. readability

词汇与结构The pilot should also be aware that on some airplanes, lowering the landing gear and/or wing flaps can _______ a cabin smoke problem.

A. aggravate
B. facilitate
C. deteriorate
D. alleviate

劳动二重性是指( )

A. 死劳动和活劳动
B. 脑力劳动和体力劳动
C. 简单劳动和复杂劳动
D. 具体劳动和抽象劳动