单选题那些制造商对飞机及其系统和部件的检查、维护和大修的时间限制给出建议，也酌情给出零部件的使用寿命。

A、 For inspections, repair and overhaul of the aircraft and its systems and units, those producers recommended time limits and life of parts if possible.

B、 Those manufacturers recommended time limits for inspections, maintenance and overhaul of the aircraft, its systems and units, and life of parts, as applicable.

C、 Those manufacturers gave time restrictions to inspect, repair and maintenance the aircraft, its systems and units, and according to the situation they gave the life of parts .

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单选题如果污染物造成孔堵塞超过 50%，就要清洁显示组件后面的孔。

A、If as many as 50% of the holes are contaminated, you should clean the display units behinds the holes.

B、The holes on the bottom of the display unit should be cleaned once over 50% of them are clogged due to contamination.

C、If contamination causes a blockage of more than 50 percent of the holes, then clean the holes on the rear of the display units.

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单选题在补片表面施加重量以确保各部件正确粘接。

A、Apply weight on the surface of the patch to make sure that the parts bond correctly.

B、The parts can be aligned properly by applying force on the surface of the patch.

C、In order to correctly attach the parts, the patch surface should be compressed.

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单选题如果发现通气管中的空气量不正确，做一个系统测试。

A、If you find an incorrect quantity of air from the vent mast, do a system test.

B、A system test should be conducted once you find an abnormal airflow from the vent mast.

C、It is necessary to do a system test after you find the air quality in the vent mast is improper.

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单选题当逆时针转动排放活门时，没有液体流出, 除非按压该活门。

A、Turn the drain valve counterclockwise to cause the fluid to stop flowing before the valve is pushed.

B、When you turn the drain valve counterclockwise, no fluid will flow until you push the valve in.

C、Make sure there is no fluid flowing after the valve is pushed, then turn the drain valve clockwise.

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单选题在这些情况下，拆除灭火瓶的爆炸帽是危险的。

A、In these conditions, removal of the squibs from the fire extinguisher bottle is appropriate.

B、It is dangerous to remove the cartridges from the fire extinguisher bottle except under these conditions.

C、In these conditions, it is dangerous to remove the cartridges from the fire extinguisher bottle.

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单选题确保襟翼缩回，并且副翼配平手轮位于零位。

A、The slats shall be retracted to ensure that the aileron trim handwheel is in the initial position.

B、Be sure to retract the flaps and keep the rudder trim handwheel in the original position.

C、Make sure that the flaps are retracted and the aileron trim handwheel is in the zero position.

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单选题在切口上粘贴第一层胶带，再呈对角线粘贴第二层和第三层胶带。

A、The first tape is applied on the cutout, then the second and third tapes are applied horizontally.

B、Apply the first layer of tape across the cutout and the second and third layers diagonally.

C、First attach the tape to the cutout, and attach the second and third layers of tape perpendicularly .

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单选题用侧风分量除以飞机速度，得到修正速度。

A、You can get the corrected velocity by dividing the aircraft velocity by the crosswind component.

B、Divide the crosswind component by the aircraft speed to get the correction.

C、Divide the aircraft speed by the crosswind component to get the correction.

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单选题 那些制造商对飞机及其系统和部件的检查、维护和大修的时间限制给出建议，也酌情给出零部件的使用寿命。

单选题那些制造商对飞机及其系统和部件的检查、维护和大修的时间限制给出建议，也酌情给出零部件的使用寿命。