549.Copy density shall be uniform throughout the page.

A. 　如果轮胎温度升高超过 177 度,插头熔化且轮胎放气。

B. 　如果轮胎温度升高超过 177 度,易熔塞和轮胎融化。

C. 　如果轮胎温度升高超过 177 度,易熔塞熔化且轮胎放气。

A. 　为了便于参考,这些分隔标签应交错放置

B. 　为了简单参考,这些分隔标签应平行放置

C. 　为了便于参考,这些分隔标签应乱序放置

A. 　图表的布置应使系统的流程能够最便于进行追踪。

B. 　图表的设置应使系统的流程能以最省事的流程进行查找。

C. 　图文的设计应使系统的流程能够最便于更改。

A. 　These tests should require no special equipment or facilities rather
than that installed on the aircraft and should be comparable to the tests
performed by the flight crews.

B. 　These tests should require none special equipment or facilities other
than that installed on the aircraft and should be comparable to the tests
performed by the flight crews.

C. 　These tests should require no special equipment or facilities other
than that installed on the aircraft and should be comparable to the tests
performed by the flight crews.

A. 　通常,当在章节末尾或出版物的后部增加页面--不影响手册中的页面时--必
须准备修订版。

B. 　通常,当在章节一端或出版物的背面增加页面--不影响手册中的页面时--必
须随时准备修订版。

C. 　通常,当在章节末尾或出版物的背面增加页面--不影响手册中已经存在的页
面时--必须准备修订版。

A. 　Fuel leaks can decrease engine performance.

B. 　A fuel leak can cause the engine to operate badly.

C. 　Fuel leakage may be lower engine performance.

A. 　移动所有孔周围的密封胶。

B. 　清除孔周围的所有密封胶。

C. 　检查所有密封胶圈绕着孔。

A. 　Make sure that there is no less than 500 liters of fuel in the tank.

B. 　Ensure that the amount of fuel in the tank does not exceed 500 liters.

C. 　Make sure that the quantity of fuel in the tank is not more than 500
liters.

A. 　通常,当在章节末尾或出版物的后部增加页面--不影响手册中的页面时--必须
准备修订版。

B. 　通常,当在章节一端或出版物的背面增加页面--不影响手册中的页面时--必须
随时准备修订版。

C. 　通常,当在章节末尾或出版物的背面增加页面--不影响手册中已经存在的页面
时--必须准备修订版。

A. 　Those units means that they can prevent it from eroding.

B. 　Those units provide a method of deicing.

C. 　Those units provide away to prevent the formation of ice.