478. Install the O-ring in the internal groove of the spherical bearing

A. Before you operate the pump again, let the reservoir temperature decrease to ambient temperature or below the temperature at which the equipment damage occur.

B. Before you operate the pump again, decrease the reservoir temperature to outside temperature to aggravate the damage to equipment.

C. Before you operate the pump again, decrease the reservoir temperature to the environment temperature around to prevent the equipment from being damaged.

A. The emergency call pushbutton on the overhead panel may be pressed in order to start an emergency call from the cockpit. This starts a communication between the cockpit and all cabin stations on a special link.

B. The emergency call pushbutton on the overhead panel must be pressed in order to initiate an emergency call from the cockpit. This initiates a communication between the cockpit and all cabin stations on a common link.

C. The urgent call pushbutton on the overhead panel must be pushed in order to initiate an urgent call from the cockpit. This initiates a communication between the cockpit and all cabin stations on a common connect.

A. 技术文本常常包含很长的词组,这些词组在一个句子中具有一个个词性的功能。

B. 技术文件常常由很长的词汇构成,这些词在句子中的词性只有一种。

C. 技术文件常常包括长词组,在同一句子中这些词的功能是一种词性。

A. Operate the actuator through three cycles.

B. Do the/actuator through three times.

C. Cycle actuator three times.

A. Use white paper with good strength characteristics and of sufficient weight and substance to eliminate excessive show through when printed on both sides.

B. Use white paper with good strength characteristics and enough weight and substance to eliminate excessive show through when printed on both sides.

C. Use white paper with good hardness characteristics and sufficient weight and quality to eliminate perspective display during double-sided printing.

A. Ensure the brown VALVE CLOSED light below each switch comes on.

B. Make sure the amber VALVE CLOSED light below each switch goes off.

C. The green VALVE CLOSED light is off.

A. Do not increase the temperature of the component until it is the same as the air.

B. If the component is of the same temperature as the ambient, lower its temperature.

C. Let the temperature of the component cool to ambient.

A. 用彩笔涂颜科。

B. 用刷子搅拌油漆。

C. 用刷子涂油漆。

A. 页码在右下角,发行日期在左下角

B. 页码在左下角,颁发日期在右下角

C. 颁发日期在右上角,页码在左下角

A. Movement of the center of gravity is not depending on the loads on the wings.

B. Movement of the center of gravity is relative with the loads on the wings.

C. Movement of the center of gravity is regardless to the loads on the wings.