Thrust reverser is used to change the direction of the exhaust gases for reverse thrust.

A. The spoilers are similar to the ailerons in that they are assisting and providing control of the airplane about the longitudinal axis.

B. The ailerons are similar to the spoilers in that they are resisting and providing control of the airplane about the longitudinal axis.

C. The ailerons are similar to the spoilers in that they are resisting and providing control of the airplane about the roll axis.

A. Before you use dangerous materials, obey these precautions:

B. Before you use dangerous materials, omit these precautions:

C. Before you use dangerous materials, disobey these precautions:

A. 在测试中，要灵活调整工作步骤的顺序。

B. 在测试中不要改变工作步骤的顺序。

C. 改变工作步骤的顺序在测试时是必要的。

A. 注意，如果没有正确执行以下步骤，会导致人员伤亡。

B. 警告，如果你不正确听从指挥，则会导致人员伤亡。

C. 如果没有正确遵循警告里的要求，将会导致人员伤亡。

A. Make sure that the bolts are tight.

B. Make sure that the screws are securely installed.

C. Make sure that the bolts are loose.

A. Substitutes with different quality can be used.

B. You can not use substitutes with same quantity.

C. Equivalent substitutes are permitted to use.

A. The test will stop when the pressure is larger than 7000 kpa.

B. Stop the test if the pressure reaches 7000 pa.

C. Stop the test when the pressure is more than 7000 kpa.

A. 基本上，它是以对飞行员最有用的形式来呈现已被证明的概念的行业标准化指南。

B. 基本上，它是一个指导行业标准化的证明概念，以一种最有用的形式提供给飞行员。

C. 基本上，它是一个证明行业标准化概念的指南，并提供一种对飞行员最有利的形式。

A. Such tests or checks will be completed according to the conditions.

B. Such tests or checks will be very complex according to the conditions.

C. Such tests or checks will be different in complexity according to the conditions.

A. 从右侧页面开始记录每个部分。

B. 每个部分都要从右侧页面开始。

C. 每个部分都写在右侧页面上。