Keep quiet to avoid missing the sound of signal.

A. Make sure that the bolt heads are attached to the skin.

B. Make sure that the screw heads are connected with the metal.

C. Make sure that the fastener heads are flush with the skin.

A. Two controversial ways can be chosen to do the test, either with the Central Maintenance Computer System through a the MCDU, like you have probably learned already, and with a test switch on the VOR receiver in the avionics compartment.

B. You can do the test following procedures -- with the Central Maintenance Computer System by the MCDU, you have probably learned already, and with a test switch on the VOR receiver in the avionics compartment.

C. The test can be done in either way below-- using the Central Maintenance Computer System via the MCDU, as you have probably already learned, or using a test switch on the VOR receiver in the avionics compartment.

A. 包括永磁电机和分配器之间的接线，在这些系统中，它们不是单独的单元。

B. 包括发电机和分配器之间的接线，在这些系统中，它们是单独的单元。

C. 包括磁电机和分电器之间的接线，在这些系统中，它们是单独的单元。

A. The pneumatic system gets compressed air from the pneumatic air sources and supplies the compressed air through ducts to the user systems.

B. The pneumatic system gets compressed air from the pneumatic air sources and supplies the compressed air through manifold to the user systems.

C. The pneumatic system gets comprised air from the pneumatic air sources and supplies comprised the air through ducts to the user systems.

A. 常规的程序检查单应简明扼要，旨在提醒飞行员检查事项，而不提供任何系统的操作细节。

B. 常规的程序检查单应准确，目的是提醒飞行员检查关于缩略语及其涉及的事项，不提供任何系统操作细节。

C. 常规的程序检查单应明确目的，旨在提醒飞行员关于检查的事项，提供包括缩略和涉及的细节。

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. Utilize an oil-free solution.

B. Use a solution with oil.

C. The oil is not used that contains a solution.

A. In some cases, for complex aircraft, special training should be conducted so that the aircraft and its systems can be maintained properly.

B. Sometimes, especially for complex airplanes, it may be necessary to provide specific training in the proper maintenance of the airplane and its systems.

C. Sometimes, for particularly complex airplanes, it is required to provide special training so as to perform proper maintenance of the aircraft and its systems.

A. The shim is t,which is thick by calculating x and y.

B. Calculate the shim,the result of the thickness is x-y .

C. The thickness of the shim is thus calculated: t=x-y.

A. Adjust the lever intentionally and reset the system to the neutral position.

B. Move the lever before setting the system to the neutral position again.

C. In case of an inadvertent lever movement, return the system to the neutral position again.