Attach the two ends of the hose.

A. The location where a red mark is on the pin needs to be lubricated.

B. You should identify the red mark on the lubricant point.

C. The lubrication point shows that you can find marks on the pin.

A. This system is used to expand and return the landing gear.

B. This system is used to extend and retract the landing gear.

C. This system is used to extract and retract the landing gear.

A. 系留操作中的警戒之一是：所有的滑行和拖动操作的最后几英尺必须是一条直线。这是为了防止对轮胎和主起落架施加力量。

B. 系留操作中的警戒之一是：所有的滑行和拖动操作的最后几英尺必须用一条直线。这是为了防止对轮胎和主起落架施加力量。

C. 系留操作中的警戒之一是：所有的滑行和拖动操作的最后几英尺必须走直线。这是为了防止对机轮和主起落架施加力量。

A. Clamps should be spaced at intervals not exceeding 24 inches. Clamps on wire bundles should be selected so that they have a snug fit without pinching wires.

B. Pins should be spaced at intervals not exceeding 24 inches. Pins on harness should be selected so that they have a snug fit without pinching wires.

C. Pins should be spaced at intervals not exceeding 24 inches. Pins on harness should be selected so that they have a snug fit without scratching wires.

A. 调整加速度计的精度。

B. 准确调整陀螺仪。

C. 调整罗盘的精度。

A. All of the top vertical mounting struts are adjustable except the primary mount struts unless they are repaired or replaced. The spare vertical strut (left forward ) and the side strut (right forward) may require adjustment during APU replacement.

B. All of the vertical primary mount struts at the top are adjustable. However, adjustments to the primary mount struts are not required unless a strut is repaired or replaced. The redundant vertical strut (forward left) and the redundant side strut (forward

C. The top of every vertical main retaining struts is adjustable. However, adjusting the main mount strut is not allowed if the strut is not repaired or replaced. During APU replacement, it may be necessary to adjust remained vertical strut (left anterior) a

A. 数据库更新正在等待中。

B. 数据库同步正在进行中。

C. 数据库升级正在按顺序进行。

A. 我们增加了元件的长度，以减少元件的电容。

B. 我们减少了元件的长度，以减少元件的电容。

C. 我们增加了导线的长度，以增加导线的电阻。

A. 开口式刮油环的安装属于临时修理，需要在前起落架拆下时更换来做其他的维修。

B. 开口式刮油环的安装属于临时修理，在前起落架拆下做其他的维修或者大修的时候，需要被更换。

C. 开口式刮油环的安装属于临时修理，在前起落架拆下做其他的维修或者定检的时候，需要被定期修理。

A. 在设计的概要图里，可能需要在让图表内容详实和便于阅读理解的简单之间妥协。

B. 在设计原理图时，可能有必要在使图不言自明所需要的细节和易于阅读和理解所必需的简单之间作出折衷。

C. 在设计插图的过程，涵盖细节来让图表自行展示且方便阅读和理解是有必要的。