417、关闭隔离活门。

A. 　 Turn the cap counterclockwise.

B. 　 Turn the cap clockwise.

C. 　 Rotate the cap clockwise.

A. 　笔记本电脑有以下主要部件。

B. 　笔记本电脑有以下初级部件。

C. 　笔记本电脑有以下仿制部件。

A. 　 Nothing will happen during retraction if the upper drag strut is replaced correctly.

B. 　 lf you install the upper drag strut by mistake, it will break the lower drag strut during extension.

C. 　 Wrong installation of the upper drag strut will cause the hitting of the lower drag strut during retraction.

A. 　如果刹车片接触到盘,根据文件移开不需要的材料。

B. 　如果托架触碰到板,用锉刀去除不需要的材料。

C. 　如果撑杆触及盖板,用填充剂移开不合适的材料。

A. 　为了保证飞机的适航性,飞机被推荐了检查程序。

B. 　推荐的检查方案随飞机一并交付,以保证其适航性。

C. 　飞机交付了推荐的检查程序,以保持它们的适航性。

A. 　 Maintenance should be accomplished preventively in accordance with theairp1ane service or maintenance
manual.

B. 　 Appropriate airplane service or maintenance manua1 shall be developed for the accomplishment of
preventive maintenance.

C. 　 Preventive maintenance should be accomplished in accordance with the appropriate airplane service、 or
maintenance manual.

A. 　 When described the aircraft and its system, you should always use third people talking.

B. 　 Generally, in describing the airplane or its system, third person wording should be used.

C. 　 When you describing the airplane systems, third person mood shall be used.

A. 　文件必须经常修订

B. 　文件必须易于修订

C. 　文件必须容易阅读和看见

A. 　每个电干扰盘的后部都有一个灵活的汇流条组件

B. 　每个电干扰盘的后部都有一个固定的汇流条组件。

C. 　每个配电盘的后部都有一个固定的汇流条组件。

A. 　 The component was damaged badly the repairing cost is over 60% of the total price. The workshop
suggests reporting as an unserviceable part.

B. 　 The component was damaged heavily, the repairing cost is over 60% of the total price. The workshop
suggests scrapping.

C. 　 The component was destroyed heavily, the repairing cost is 60% of the total price. The workshop suggests
segregation.