指针沿刻度垂直移动。

A. 应描述系统中每个组件的功能、操作以及位置。

B. 系统中每个组件的目的、操作应和位置一样被描述。

C. 系统中每个组件的功能和构成应被描述得和位置一样好。

A. 齿轮箱是一个包含齿轮系和轴的箱体。

B. 齿轮箱包含了齿轮火车和曲轴。

C. 有一类齿轮箱包含了齿轮组和轴。

A. Rise the cylinder up its install position.

B. Lift the cylinder above its installed position.

C. Lift the bushings above its installing position.

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. The wheel chocks must be put forward of the wheels while the aircraft is on the ramp.

B. If the aircraft must be parked on the apron, put the wooden blocks in front of the wheels.

C. If you must park the aircraft on a slope, make sure that wheel chocks are in front of the wheels.

A. Make sure that the position of the clamp agrees with the position that you recorded during the removal procedure.

B. Confirm that the recorded condition during the removal procedure agrees with the condition of the clamp.

C. Ensure that the clamp is correctly oriented based on the suggested position documented during the removal procedure.

A. If the wheel temperature reaches as high as 177 deg., the core of safety plug shears off and the tire slips.

B. If the wheel temperature increases to more than 177 deg., the core of the fusible plug melts and the tire deflates.

C. The core of the filter element melts once the wheel temperature is above 177 deg., causing the tire to deflate.

A. 左1号登机门1号地板右前边缘有一条1英寸深6英寸长的凹陷。

B. 左1号登机门1号地板离右前边缘6英寸处有一条1英寸深的凹槽。

C. 左1号登机门有一块地板到右前边缘6英寸处有一条1英寸深的凹坑。

A. 对于飞机维修中的行为，法规中规定的要求很重要。

B. 了解法规的要求对于飞机维修来说非常重要。

C. 在飞机维修活动中，遵守法规是非常重要的。

A. 供气系统被多个子系统共用，能够为水箱加压以确保流体的流动。

B. 空气供应系统是某一个子系统独用的部分，其作用是为供应罐加压以确保流体流动。

C. 空气供应系统是多个子系统共用的部分，其作用是为供应罐减压以延缓流体流动。