Attach the ropes on the ground with the mooring points.

A. The lower seal is invisible prior to switching the lower bearing on.

B. The lower seal becomes visible when you push the lower bearing up.

C. The lower seal comes into view when you pull the lower bearing down.

A. 加速停止距离是指飞机按照要求加速到指定速度所需的距离，并假定在达到该距离的那一刻发动机发生故障，飞机需要停止飞行。

B. 加速停止距离是指将飞机加速到指定速度，并假定在达到该速度的那一刻发动机发生故障，使飞机停止飞行所需的距离。

C. 加速停止距离是指将飞机加速到规定速度，并推测在达到该速度时发动机故障，飞机须立即停止飞行。

A. At the manufacturer＇s option, static pressure systems description and discussion may be combined with Paragraph 7.49, Pitot Pressure Systems.

B. The manufacturer could combine the description and discussion of the dynamic pressure systems in Paragraph 7.49, Pitot Pressure Systems.

C. The manufacturer decides to insert static pressure systems description and discussion into Paragraph 7.49, Pitot Pressure Systems.

A. The aim of STE is that readers all over the world can easily understand the technical texts and that writers who are responsible for preparing technical texts know how to prepare them in a easy method.

B. The objective of STE is to provide writers with general principles on how to prepare technical documents in a clear, simple and distinct manner that readers all over the world can easily understand.

C. The function of STE is to describe how to prepare technical texts in a easy, clear and specific way and to allow readers all over the world to understand difficultly.

A. The gears will automatically engage if a malfunction occurs.

B. If there is proper functioning, the gears will automatically engage.

C. If there is a malfunction, the gears will automatically disengage.

A. After finishing the following procedure, repair the upper flange.

B. Repair the lower flange first during the procedure that follows.

C. Repair the upper flange first during the following procedure.

A. For vocabulary, only main alternation are highlighted, minor alternations to many approved and not approved examples are not highlighted.

B. For wordlist, only major changes are highlighted, minor changes to various approved and not approved examples are not highlighted.

C. For vocabulary, only main alternation are prominent, minor alternations to many approved and not approved examples are not prominent.

A. 原理图应倾向于处理整个系统，而不是附属系统。例如，空调系统，而不是空调系统内的压缩机。

B. 原理图应倾向于处理整个系统，而不是附件系统。例如，空调系统，而不是空调系统内的压缩机。

C. 原理图应尽量呈现整个总系统，而非各个子系统。例如，空调系统原理图不应把重点放在其中包含的压气机上。

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. 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.