堵盖的拆卸是必要的。

A. The brackets should be connected to the nearest components.

B. Align the brackets with the adjacent components.

C. Keep the brackets engaged with the nearby components.

A. The Index Numbering System is described in the following paragraph.

B. The Index Numbering System is introduced in the next paragraph.

C. The Index Numbering System is compared in the later paragraph.

A. Get the approval of the design authority,whatever it is necessary to change the repair scheme.

B. Change the repair scheme, until getting the approval of the design authority.

C. If it is necessary to change the repair scheme, get the approval of the design authority.

A. 在起落架和舵面锁的使用、最小转弯半径、对前起落架的最大拖动载荷等方面的安全须知和限制

B. 在起落架的使用、舵面锁、最小转弯半径、对前起落架的最大拖动载荷等方面的安全须知和限制

C. 在起落架锁和舵面锁的使用、最小转弯半径、对前起落架的最大拖动载荷等方面的安全须知和限制

A. Do not jar the instruments

B. Do not pivot the instruments

C. Do not shake the instruments

A. Flush the pipes with a disinfectant solution.

B. Flush the pipes by a virus solution.

C. Flush the pipes by a anti-virus fluid.

A. 飞机已按照制造商要求或同等标准进行检查。

B. 飞机已按照运营人要求或同等标准进行维护。

C. 飞机已按照制造商建议或同等标准进行维护。

A. The job is required to be divided into logical steps or operations.

B. This needs to break the work and distribute the logical steps or operations.

C. This requires to destroy the job logically into steps or operations.

A. 在每个章节的开始都是系统及其操作的描述，以“描述及操作”为标题贴上标签。如果与其它系统有交联，应该则另外进行解释。

B. 每个章节都要以一个概要介绍本系统做为开始，并且其操作和将要对操作进行的描述要进行标注。如果其中有关联，要增加解释。

C. 每一章或节都以系统及其操作的一般概述开始，并以“概述和操作”为标题。如果与其他系统之间存在相互关系，则应加以解释。

A. It includes items such as audio selector control panel, microphones, head­ phones, cockpit loud speakers, etc.

B. It includes items such as automatic selector control panel, interphones, head­ phones, cockpit loud speakers, etc.

C. It includes items such as audio selector control panel, microphones, head­ phones, cockpit speakers, etc.