Do the work in an area away from equipment or metal frame buildings.

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.

A. Do not install 0.1 mm thick shims.

B. Do not install shims which are more than 0.1 deep.

C. Do not install shims that are more than 0.1 mm thick.

A. 风扇和增压器是一个四级压气机。

B. 增压器是一个四级压气机风扇。

C. 风扇是一个四级增压器的压气机。

A. Clean all lint, dust and debris from the ventilation holes located on the aft side of the captain＇s primary flight, navigation, and center lower engine display units.

B. Clean the vent holes behind the captain＇s primary flight, navigation and lower middle engine display units which are blocked by lint, dust and debris.

C. The captain＇s primary flight, navigation, and center lower engine display units must be cleaned since the ventilation holes behind them are clogged by lint, dust and debris.

A. The autopilot has reached its roll authority limit due to an airplane roll or yaw asymmetry.

B. The autopilot has been out of its roll authority limit due to an airplane roll or yaw symmetry.

C. The autopilot has reached its yaw authority limit due to an airplane roll or yaw imbalance.

A. 数据应能够显示外界空气温度、高度、重量和风与着陆距离的关系。应包括地面滑跑和飞越50英尺障碍物的总距离。应给出为获得总距离所需的50英尺高度点上的速度。

B. 数据应显示为着陆距离与外部气温、高度、重量和风的关系。应包括地面滑跑和飞越50英尺障碍物的总距离。应给出在50英尺高度点达到总距离的速度。

C. 数据应能够显示外界空气温度、高度、重量和风与着陆距离的关系。 应包括着陆滑跑距离和从离地 50 英尺到着陆完全停止所需的总着陆距离。应给出飞机飞抵50 英尺高时的速度。

A. The compressor needs to be equipped with a pressure regulator, air hoses, and an appropriate filter system to ensure that clean, dry, oil-free air is delivered to the nozzle.

B. A press regulator, air ducts, and a proper filtration system form the compressor, which surely delivers clean, dry, oily air to the spray nozzle.

C. For the compressor that ensures clean, dry, oilless air is delivered to the injector, it is necessary to be equipped with a pressurization regulator, air pipes, and an adequate filter system.

A. 自主式定位包括惯性制导系统、天气雷达、多普勒、接近预警、避撞、星体跟踪器等部分，以及六分仪/八分仪等。

B. 自主式定位包括导向系统、天气雷达、多普勒、近地警告、避撞、星体雷达等部分，和六分仪/八分仪等。

C. 自主式定位包括导向系统、天气雷达、多普勒、接近预警、避撞、星形跟踪器等部分，和六分仪/八分仪等。

A. 不要打印标题页的后一页。

B. 不要印在扉页的背面。

C. 不要在标题页后面涂改。

A. 使用危险品时穿上防护服。

B. 使用溶剂时穿上防护服。

C. 使用易感染物品时穿上防护服。