The main frame of the wing includes spars, ribs, stringers, integral fuel tank structure, tip tank supporting structure and frames around openings.

A. Perform an external zonal inspection of the lower fuselage.

B. Inspect the outer area of the lowest fuselage.

C. Do the exterior medial check of the fuselage .

A. When you move the alternate nose wheel steering switch to the alternate position, the landing gear transfer valve moves to the alternate position. The landing gear transfer valve moves the pressure source for the landing gear retraction and the nose wheel

B. When move the alternate switch to steer the nose wheel to the alternate position, the landing gear transfer valve moves to the alternate position. The landing gear transfer valve moves the pressure source from hydraulic system A to hydraulic system B duri

C. When moving the alternate nose wheel steering switch to the alternate position, the landing gear transfer valve moves to the alternate position. The landing gear transfer valve removes the pressure source from the landing gear retraction and the nose whe

A. 压力波动和震动会导致软管磨损。

B. 压力堵塞和摆动可以造成软管老化。

C. 压力骤然上升和晃动会使软管分层。

A. “检查程序”用于列出要使用的检查程序，如磁性粒子、目视检查等，也可参考其他文件（如《无损检测手册》）中包含的程序。

B. “检查程序”用于规定要使用的检查程序，如磁粉检查、目视检查等，也可指向其他文件（如《无损检测手册》）中包含的程序。

C. “检查程序”用于规定要使用的检查程序，如磁粉检查、目视检查等，并可寻找另一个文件的实际程序，如无损检测手册。

A. CAP是飞机持续适航的初级文件，包括各相关程序。

B. CAP是包含飞机持续适航程序的主要文件。

C. CAP是飞机持续适航的初始文件，由相关程序组成。

A. 技术动词既可以用作动词，也可以用作名词。

B. 技术动词只能用作动词，不能用作名词。

C. 技术动词和动词的用法相同，与名词不同。

A. Each door has flexible seals at its structure interface which protect the metal interfaces from damage by the airflow.

B. Each door has flexible seals at its structure interface which protect the metal interfaces from no damage by the airflow.

C. Each door has formalist seals at its structure interface which protect the metal interfaces from damage by the airflow.

A. When hydraulic system B engine drive pump pressure is under normal conditions，the hydraulic power transfer unit system supplies standby hydraulic pressure to the leading edge flaps and slats.

B. The hydraulic power transfer unit system is provide spare hydraulic pressure to the leading edge flaps and slats when hydraulic system B engine-driven pump pressure is abnormal.

C. The hydraulic power transfer unit system supplies alternate hydraulic pressure to the leading edge flaps and slats when hydraulic system B engine-driven pump pressure is below normal.

A. 用1/2英寸的扳手拆下盖子。

B. 用1/2英寸长的扳手拆下端盖。

C. 用1/2英寸的套筒拆下盖子。

A. Use the correct tools to open the containers for these materials.If you do not follow these prerequisites, injury to your skin and lungs can occur.

B. Get the corrective tools to open the containers for these materials.If you do not obey these precautions, injury to your skin and lungs can occur.

C. Get the proper tools to open the containers for these materials.If you do not observe these precautions, injury to your skin and lungs can occur.