558.This kind of accident indications,if not solved in time,would cause a serious accident.

A. 为增压飞机和涡轮增压或涡轮螺旋桨动力的飞机,最大高度限制应该予以说明。

B. 对于增压的飞机以及涡轮增压或涡桨为动力的飞机,应规定最高飞行高度限制。

C. 为飞机增压和发动机涡轮增压或螺旋桨动力设置,应说明最高限制。

A. This document compliments informaiton to the applicable airplane maintenance manual(s).

B. This document provides necessary informaiton to the applicable airplane maintenance manual(s).

C. This document provides supplemental informaiton to the applicable airplane maintenance manual(s).

A. If fault message continues,push the audio cancel pushbutton on the aviation electric test panel.

B. If fault message persists,press audio cancel pushbutton on the avionics test panel.

C. If fault message goes on,press audio cancel pushbutton on the airborne test panel.

A. Check the fluid prior to mixing.

B. Prior to checking the fluid,ensure it has been mixed.

C. Never mix the fluid before testing.

A. 在高压设备附近工作时,要注意遵守相关的安全预防措施。

B. 进行高压设备操作时要遵守安全操作手册。

C. 在高压设备上工作时要遵守安全防范措施。

A. Replace the No.1 and No.2 computers.Then do the test again.

B. Interchange the No.1 and No.2 computers.Then do the test again.

C. Repair the No.1 and No.2 computers.Then do the test again.

A. Emergency Exit means the exit doors used to facilitate evacuation that are not normally used for exit.

B. Emergency Exit is usually used as exit whose function is convenient for evacuation.

C. Emergency Exit stands for the exit doors but not the exit which is used to facilitate evacuation.

A. When fuel comes out,you should perpare for fire eliminating.

B. It is necessary to exterminate fire properly when fuel starts to leak.

C. Use a fire extinguisher immediately if there is fuel leakage.

A. 信函是白纸黑字印刷的。

B. 字母是白色背景下哑光黑色的。

C. 书信需要黑白复印件。

A. This tool is mandatory.

B. This tool is optional.

C. This tool is necessary.