2799. 你无需给飞机泄油便可拆掉作动器。

A. 确认指针未超出范围。

B. 确认指针消失。

C. 确认指针灵敏。

A. Paint in sealing compound twice the surfaces that have no cover;

B. Apply two layers of sealing compound on the surfaces that have no protection;

C. Brush the surfaces twice with sealant to protect them from damage;

A. As only approved limitations may be excluded in this Section,an introductory statement to this effect shall be contained in a prefatory note or the opening paragraph.

B. An introductory statement to this effect included in a prefatory note or the opening paragraph,that only approved limitations may be included in this Section.

C. Due to only approved limitations may be included in this Section,an introductory statement to this effect shall be included in a prefatory note or the opening paragraph.

A. It＇s not easy to install more than two washers for each bolt.

B. It is forbidden to install more than two washers for each bolt.

C. Installing one washer for each bolt is forbidden.

A. The boost pumps supply trim tank fuel to the engine feed manifold.

B. The boost pumps supply main tank fuel to the APU.

C. The boost pumps supply main tank fuel to the engine feed manifold.

A. There is one shutoff valve on each air-driven pump (ADP)assembly.

B. Each pump assembly has a fire cock.

C. There is one dump valve on each air-driven pump (ADP)assembly.

A. Describe how to operate the safety belt and wire harnesses.

B. Tell the way to use the seat and shoulder belts.

C. The seat and shoulder harness should be used by the pilot.

A. 你需要在安装发动机时更换大量零件。

B. 更换发动机时,你可以安装大量部件。

C. 在发动机安装时可能更换大量部件。

A. 读者在执行程序或工作步骤之前是否必须知道哪些特定条件,需要先明示。

B. 如果读者在执行某个工序或工作步骤之前必须了解某个具体情况,则首先说明这个具体情况。

C. 如果读者必须了解某个额外要求才能执行工作程序与步骤,先给出这个要求。

A. 对配件进行颜色编码。

B. 用合适的颜色识别组件。

C. 给组件涂上正确的颜色。