确保工作区域有足够的空气流通。

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.

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.

A. 此区域所有人员必须佩戴防毒面具。

B. 该区域所有人员必须佩戴口罩。

C. 必须给该区域的所有人员配置防烟面罩。

A. Make sure to dim the panel lights during day and night operation.

B. During night operation, make sure that the panel lights are moderately bright.

C. Ensure that the panel lights are set to a dim setting during night operations.

A. Find out which door has a fault and is closed.

B. Make sure that which door has a failure.

C. Find out which door has not closed.

A. This tool is mandatory.

B. This tool is optional.

C. This tool is necessary.

A. 当有金属碎片时必须检查临近的泵。

B. 当发现金属痕迹时，必须检查所有的泵。

C. 当发现金属碎屑时，必须检查相应的泵。

A. Altitude meter shows the aircraft altitude relative to the horizon.

B. Attitude meter shows the aircraft attitude relative to the horizon.

C. Altitude meter shows the aircraft altitude relative to the level.

A. 起飞滑跑距离所需的速度应高于相同构型下的无动力失速速度。

B. 确定地面拉起距离的速度应高于相同构型的发动机关断失速速度。

C. 确定地面滑跑距离的速度应该高于相同配置下的断电失速速度。

A. The data may be supplemented by brief descriptions of additional characteristics or features if desired.

B. If necessary, the detail may supplement some simple descriptions of additional characteristics or properties.

C. If desired, the data may be added by simple presentations of additional values or properties.