When the area is sufficiently cool, polish the surface.

A. Each of the two life vests located at L2 entry door flight crew station is damaged.

B. Each of the two life vests located at L2 entry door flight crew station is out of time limit.

C. Each of the two life vests located at L2 entry door flight crew station is out of service.

A. Magnetic tools have an unwanted effect on the compass system.

B. Metallic tools are of positive effect on the compass system.

C. Magnets can affect the compass system adversely.

A. 冷却组件用来冷却风扇管道中的空气。

B. 点火组件是由来自风扇涵道的空气进行冷却的。

C. 加热组件是在风扇涵道的空气里进行冷却的。

A. 用一些辅助螺栓来暂时安装部件。

B. 用一些附加螺丝固定组件。

C. 用一些辅助螺丝临时组装组件。

A. Make sure you press the switch when you hear the boarding music.

B. Make sure you press the switch after you hear the boarding music.

C. Make sure that you hear the boarding music after you push the button.

A. The antenna should be put in the right position on the airplane surface.

B. There is an antenna positioning in the suitable place on the airplane skin.

C. Correct the antenna position on the airplane surface.

A. 将飞机放回到通常停放位。

B. 将飞机放回到初始位置。

C. 将飞机恢复到初始构型.

A. 字典中包括一些未经更新的单词，如果您可以将它们放入应用的技术名称类别中，它们可以是技术名称。

B. 字典中包括一些未经批准的单词，如果您可以将它们放入适用的技术名称类别中，它们可以是技术名称。

C. 字典中包括一些未经批准的单词，包括技术名称，如果您可以将它们放入适用的技术名称类别中则属于此类词汇。

A. 纠正措施在适航指南中给出，如检查，维修或改装，在适航指南中详细说明，或在另外一个文件中给出，如制造厂家服务通告，该服务通告在适航指南中作为参考。

B. 适航指令描述的纠正措施，比如检查、修理或改装的具体要求，可由适航指令详细给出，或包含在另外一个文件中，如制造厂家服务通告，该服务通告在适航指令中列为参考文件。

C. 适航指令或另一个文件，如制造厂家服务通告可详细给出检查、修理或大修等纠正措施，该服务通告刊登在适航指令中作为参考。

A. To improve the safety operations, airspeeds shall be a preface to the Normal Procedures Section.

B. The airspeeds shall be provided as an introduction to enhance the safety operations.

C. The airspeeds which may enhance the safety of operations shall be provided as a preface to the Normal Procedures Section.