在高压电环境下工作时，请遵守安全注意事项。

A. 不同类别和型号的飞机在设计和复杂性上的差异对具体故障有很大影响。

B. 设计上的差异以及各种类型和型号的飞机的复杂性都对一个具体故障产生很大影响。

C. 各种类别和型号的飞机因设计不同导致其复杂性不同，飞机承担的主要功能也不同。

A. 如图4所示，测量凹坑的深度。

B. 如图4所示，检查凹坑的尺寸。

C. 如图4所示，测量磨损的厚度。

A. 用标签识别拆下的零件，此方法将有助于随后的装配过程。

B. 保存好拆下标签的零件，此方法将有助于随后的装配过程。

C. 用标签识别拆下的零件，此方法将有助于子部件的安装。

A. These airworthiness directives provide detailed information about continued airworthiness requirements for the manufacturer and owner/operator.

B. These service bulletins provide detailed information regarding continued airworthiness requirements for the manufacturer and owner/operator.

C. These advisory circulars provide specific information regarding continued airworthiness requirements for the manufacturer and owner/operator.

A. Landing gear is left for ten minutes.

B. Landing gear should be kept extended for ten minutes.

C. Extend landing gear after ten minutes＇ retraction.

A. Make sure that the latch is fully engaged.

B. Make sure that the knob is fully engaged.

C. Make sure that the latch in full engaged position.

A. The connector has 32 contacting points.

B. The contact has 32 contactors.

C. The contactor has 32 contacts.

A. 这些窗户是机身和乘员舱的窗户，包括挡风玻璃和那些安装在门上的窗户。

B. 窗户是指机身和乘员舱的窗户，包括挡风玻璃和安装在门上的窗户。

C. 窗户指位于机身和驾驶舱的窗户，包括风挡和安装在舱门上的窗户。

A. On pressurized aircraft, the cabin air is distributed with a system of air ducts leaded from the pressurization source into and throughout the cabin. Typically, air is ducted to and released from ceiling ventilation.

B. Distribution of cabin air on pressurized aircraft is managed with a system of air ducts leading from the pressurization source into and throughout the cabin. Typically, air is ducted to and released from ceiling vents.

C. On pressurized aircraft cabin air is distributed with a system of air ducts leaded from the pressurization source into and throughout the cabin. Typically, air is ducted to and released from ceiling flap.

A. 描述飞机静压系统时，应阐述加热和通风系统的影响以及开窗对备用静压系统的影响。

B. 描述飞机静力系统时，应阐述加热和通气系统以及开窗对备用静力系统的影响。

C. 描述飞机静压系统时，应阐述加热和排气系统以及开窗对替代静压系统的影响。