The pressure decreases while the tires become cool.

A. 接通液压时应确保手柄未接触止动点。

B. 液压释压时，确保手柄未触碰到止动点。

C. 使用液压时应确保控制手柄持续移动。

A. 如果安装了某一个设备，那么要说明安装它的重要性。

B. 如果安装了其中一个设备，则说明它是否是必需的设备。

C. 如果安装了两个设备，需要说明其必要性。

A. 如果情况发生变化，则使用不同的材料。

B. 如果情况发生改变，则使用不同的建筑物。

C. 如果意思有变化，则使用不同的结构。

A. 使用多余的清洁剂清洁该区域。

B. 清除该区域多余的密封胶。

C. 在该区域内清理有害的密封剂。

A. Do not lift the aircraft on jacks if the wind speed is more than 20 MPH.

B. Do not hoist the aircraft on chocks if the wind speed is more than 20 MPH.

C. Do not raise the aircraft on jacks if the wind speed is more than 20 km/h.

A. Instead of starting each program at the top of a new page, procedures should be prepared in chapter numbering sequence, with appropriate primary and secondary headings.

B. Each Chapter of the procedure shall be prepared in reference number order with appropriate, hierarchical headings. The beginning of a new section of the procedure does not need to start a new page.

C. Procedures shall be prepared in reference number sequence within each Chapter with proper major and minor subject heads, without the necessity of each procedure starting at the top of a new page.

A. 每一“补充程序” 通常应只包括单一的系统、装置或设备，如自动驾驶仪、电子削减器或区域导航系统。

B. 每个“补充程序” 通常只包括一个单独的系统、装置或部分设备，如自动驾驶仪、电动调节装置或区域导航系统。

C. “补充程序” 通常仅针对单个系统、装置或设备，如自动驾驶仪、电动配平、或区域导航系统。

A. Use backthrust to change the direction of the exhaust to achieve contrary thrust.

B. Thrust reverser is used to change the direction of the exhaust gases for reverse thrust.

C. To change the direction of the exhaust nozzle, the thrust reverser is used to obtain the opposite thrust.

A. Filling with oxygen is not permitted during defueling and refueling.

B. Servicing with oxygen is not allowed during refueling and defueling.

C. Servicing with oxygen is not prohibited during fueling and defueling.

A. Install a new gasket on the flange.

B. Install a new washer on the fixture.

C. Install a new basket on the fitting.