3068. 在吊起齿轮箱之前组装好可移动的起重机。

A. Make sure that the fire extinguishers are in position before starting the engine.

B. Check the position of fire extinguishers before you start the engines.

C. Examine the location of the fire extinguisher before you maintain the engine.

A. 确保秒表指示在2分钟或4分钟。

B. 确保秒表指示在2 至4分钟之间。

C. 确保指针指示在2 至4分钟之间。

A. 凹坑没有伤及保护漆层。

B. 划痕没有穿透保护层。

C. 划痕没有贯穿保护膜。

A. The manufacturers of major components must provide maintenance,troubleshooting,inspection and repair data in the same layout of this specification.

B. The manufacturers of major components is looking forward to maintenance,troubleshooting,inspection and repair data with the same form of this specification.

C. The manufacturers of major components should provide maintenance,troubleshooting,inspection and repair data with same format of this specification.

A. 发动机中空气和燃油混合并燃烧的部分。包括项目,如火焰筒,壳体等。

B. 发动机中空气和燃油混合并在火焰筒和壳体内燃烧。

C. 发动机中空气和燃油混合并燃烧的部分。包括火焰筒,壳体。

A. When you do maintenance on the waste water system, make sure that your gloves are put on.

B. Face away from waste water system when you do maintenance on it with gloves.

C. Face away from your gloves when you do maintenance on the waste water system.

A. The crankshaft in an aircraft engine also absorbs power from all cylinders or is used to transfer power from cylinders to propellers.

B. The crankshaft in an aircraft engine also absorbs power or transfers work from the cylinders to the propeller.

C. The crankshaft in an aircraft engine also absorbs the power or work from all the cylinders and transfers it to the propeller.

A. 当动力源(电动,气动或液压)为单个部件提供服务或为单个功能系统提供服务时,该动力源将包含在其所服务的部件或系统中讨论。

B. 当动力源(电动,气动或液压)为不同的部件提供服务或为不同的功能系统提供服务时,该动力源将包含在其所服务的部件或系统中讨论。

C. 当动力源(电动,气动或液压)为单个部件提供服务或为单个功能系统提供服务时,该动力源将包含在其所服务的部件和系统中讨论。

A. 测量跑道灯连接的电阻。

B. 校准跑道灯连接的电阻。

C. 复核跑道灯连接的电阻。

A. The primary function of the power unit is to supply electrical power.

B. The main purpose of the power plant is to provide electricity.

C. To serve for electrical supply is the only function of the power unit.