56.接近 1 号液压系统的储压器。

A. 　能防止自由运动的活塞在套筒中有划痕。

B. 　刻痕能阻止活塞在套筒中的自由运动。

C. 　刻痕能防止自由运动的活塞在套筒中。

A. 　if the engine appears to be heating, turn it off.

B. 　if the engine appears to be overheating, turn it off.

C. 　if you think the engine is too hot, turn the switch to “off”.

A. 　 arms

B. 　 activates

C. 　 releases

A. 　航道与跑道中心线对齐,下滑道与跑道出口成一定的角度。

B. 　航道与跑道中心线对齐,下滑道与跑道入口成恒定的角度。

C. 　航道与跑道中心线平行,下滑道与跑道出口成恒定的角度。

A. 　Maneuvering Speed is the maximum speed what required of full uncommitted
aerodynamic control will not exceed the airplane.

B. 　Maneuvering Speed is the largest speed that the aerodynamic application
by the full available control will not cause the aircraft overexert.

C. 　Maneuvering Speed is the maximum speed at which application of full
available aerodynamic control will not overstress the airplane.

A. 　irworthiness Programs prepared to enhance safety.

B. 　、Standardization will enhance safety though uniform interpretation of
inspection requirements contained in

C. 　、Standardization will in accord with this Specification through uniform
interpretation of inspection requirements contained in Continuing

A. 　型号合格证

B. 　类型合格证

C. 　型号许可证

A. 　Adjust the clinometer until the bubble is in the center.

B. 　Adjust the thermometer until the bubble is in the center.

C. 　Adjust the hygrometer until the bubble is in the center.

A. 　If there is hum from the loudspeaker,don't adjust the potentiometer.

B. 　Adjust the potentiometer unless hear a hum from the loudspeaker.

C. 　Adjust the potentiometer until the loudspeaker no longer hums.

A. 　如果大型插图水平放置,索引批注和标题最好是径向放置。

B. 　尽管大型插图水平放置,索引批注和标题最好是垂直放置。

C. 　因为大型插图横向放置,索引批注和标题最好是垂直放置。