Manufacturers may omit systems not applicable to their product.

A. The incorrect operation of the connection units will result in a dirty contact.

B. A dirty contact in the connection units will cause them to operate incorrectly.

C. Improper operation of the connection units might be attributed to a dirty contact.

A. 专用设备 - 本章应包括前几章未包括的设备和系统。

B. 特殊用途设备 - 这一章应包括这些设备和系统，不包括前面的章节。

C. 特种设备 - 该章节应加入这样的设备和系统而不是前述所有章节。

A. Replace the defective booster pump.

B. Remain the present booster pump.

C. Recharge the failed booster pump.

A. 拆下活门旁边的泵。

B. 拆下位于泵上的活门。

C. 拆下泵旁边的活门。

A. 本手册提供了基本的控制和操作信息，这些信息描述飞机部件如何被控制，如何操作这些部件，以及所有特殊操作程序和操作限制。

B. 该手册提供基本控制和操作信息，描述飞机部件的生产控制工艺，包括适用的特殊生产步骤和公差值。

C. 本手册提供了基本的控制和操作信息，描述飞机部件的控制方式和工作方式，且包括所有适用的特殊程序和限制条件。

A. 螺旋桨系统包括完整的机械或电气驱动螺旋桨、泵、马达、调速器、交流发电机，以及用于控制桨叶角的发动机外部或与发动机一体的组件和部件。

B. 螺旋桨系统包括完整的机械或电动螺旋桨、泵、马达、调速器、交流发电机是用来控制桨叶角的发动机外部或整体的组件和部件。

C. 螺旋桨系统包括完整的机械或电动螺旋桨、泵、马达、调速器、交流发电机和那些组件和部件，都位于发动机外部，或者与发动机是一个整体，用于控制桨叶角。

A. Write the instructions in the mandatory mode.

B. Write the instructions in the imperative form.

C. Write the instructions in the active mode.

A. Maintenance information needs to be continuously updated. The operator should communicate openly with the manufacturer about new situations, who should provide solid assistance to the operator. Only when both parties do their jobs can the entire fleet remain completely safe.

B. Maintenance information needs to be continually updated. Open communication should exist with the operator telling the manufacturer as soon as some new kind of situation arises and the manufacturer responding back with solid help to the operators. Only when both ends do their job can an entire fleet of airplanes remain continuously airworthy.

C. Maintenance information needs to be continuously updated. When a new situation arises, the operator should immediately communicate openly with the manufacturer, and the manufacturer should provide strong assistance to the operator. Only when both parties do their respective jobs can the entire fleet maintain airworthiness.

A. 将修理的盖板铺在受损伤的区域。

B. 把修理补片精确地补到损伤区域。

C. 精确的将受损伤的区域围挡起来。

A. 把返回文件放在安全的地方。

B. 把备份文件放在安全的地方。

C. 把备份文件放在安全的柜子中。