These actuators control the movement of the ailerons and elevators, which control the flight path of the airplane.

A. 找出液压油渗漏的源头。

B. 找出滑油溢出的源头。

C. 找出燃油泄漏的源头。

A. 如果由于空间限制必须使用晦涩的写法，则应在图像空白区域用引号标识并解释清楚。

B. 如果由于空间限制必须使用晦涩的缩拼，则应用星号标识并在图像空白区域给出全拼。

C. 如果由于空间限制必须使用晦涩的小写，则应在图像空白区域用括号标识并拼写清楚。

A. Interior Labels and Signs are required for interior general and emergency information, instructions, cautions, warnings, etc.

B. Interior Placards and Markings are required for interior general and emergency information, instructions, cautions, warnings, etc..

C. Interior Placards and Signs are required for interior general and emergency information, instructions, warnings, cautions, etc.

A. Select the specific system that you will apply pressure to.

B. Select the hydraulic system that you will pressurize.

C. Identify the hydraulic system that you will bleed.

A. 功能测试应该包含进行性能测试所必要的所有信息，以保持系统或组件的可靠性在可接受的水平，而不用参考其他文件。

B. 功能测试包括所有必须的信息，无需参照附加文件，就可以执行为了保证系统及部件的可靠性而做的能力测试。

C. 不用参照其它材料，功能测试为了确保系统或组件的可靠性是可接受的而提供了所有必须的信息。

A. On the label, read the date of the last inspection.

B. Check the date of latest inspection on the log.

C. On the label, make sure the date of last check.

A. 从软管开始弯曲的地方测量软管的弯曲半径。

B. 在软管弯曲的地方开始测量软管的内径。

C. 从软管弯曲的内侧开始测量软管弯曲的角度。

A. Code is useless to identify the cables.

B. Put a code on the cables to identify them.

C. A tag should be attached to the cables.

A. Check wash basin drains, water tap and its lines for leakage.

B. Inspect the washing sink, faucet and its pipe for leakage.

C. Examine the washing hand drain port, tap and the line for crack.

A. Make sure that the quality of fuel in the reservoir is not more than 500 liters.

B. Make sure that the quantity of fuel in the tank is not more than 500 liters.

C. Make sure that the quality of oil in the tank is not more than 500 liters.