如果你发现断了的电线，就把它们修好。

A. 陀螺的突然运转会引起水平安定面不必要的移动。

B. 陀螺的意外操作会引起垂直安定面不必要的移动。

C. 水平安定面的突然移动会引起陀螺的意外操作。

A. Use a solution of foam and water to clean.

B. Clean with bleach and water.

C. Clean with a solution of soap and water.

A. Possibly, the incorrect operation will occur due to the contaminated oil jet.

B. Incorrect operation is absolutely resulted from a blocked ignitor.

C. A blocked oil jet can cause incorrect operation.

A. 真空子系统是指用于产生、输送和调节高于大气压的空气的装置和部件，包括泵、调节器、管线等，该子系统还包括歧管。

B. 真空子系统是指用于产生、输送和调节低于大气压的空气的装置和部件，包括泵、调节器、管线等，但该子系统并不通过和包括歧管。

C. 真空子系统是指用于产生、输送和调节低于大气压的空气的组件和部件，包括泵、调节器、管线等以及总管和流经总管的部件。

A. The units and components which store, regulate, and deliver oxygen to the passengers and crew include oxygen bottles, relief valves, shut-off valves, outlets, regulators, masks, etc.

B. The units and components which reserve, adjust, and transfer oxygen to the passengers and pilots include oxygen bottles, relief valves, shut-off valves, outlets, regulators, masks, etc.

C. The units and components to store, adjust, and transfer oxygen to the passengers and crew include oxygen bottles, release valves, shut-off valves, outlets, regulators, masks, etc.

A. 拆除校装销和设备，以阻止控制舵面的自由运动。

B. 拆除校装销，安装能够阻止控制舵面自由移动的设备。

C. 拆除能够阻止控制舵面自由移动的校装销和设备。

A. Get approval for all modifications from the design authority.

B. The design department is irresponsible for approving the changes.

C. The arrangement has to be approved by the design department.

A. 在每页的右下角输入页数和发行或改版日期。

B. 在每页的底部打印页码和发行或修订日期。

C. 在每页的底部输入页码和发行或修订数据。

A. It is forbidden to go into the engine test area with approval.

B. Entering the engine test area must not be approved.

C. Approval is a must when entering the engine test area.

A. Identify the disassembled parts with tags.

B. To notice the removed parts with the lable.

C. To mark the assembled parts with the cards.