A pressurized system can cause injury to persons when they do work on it.

A. 406MHz数字信号可识别应急定位发射器及其位置。

B. 406MHz数字信号可标记应急定位发射器并发送其位置。

C. 406MHz数学信号可由应急定位发射器来识别并发送其位置。

A. 在”停放“这节中包含一些预防措施和限制， 例如在起落架减震支柱内的压力和机轮的转动方面。

B. 在”停放“这节中包含一些预防措施和限制， 例如在起落架减震支柱内的压力和机轮的转速方面。

C. 在”停放“这节中包含一些预防措施和限制， 例如在起落架减震支柱内的油压和机轮的转速方面。

A. 使用不含油的溶液。

B. 使用不含油的解决方案。

C. 使用的滑油里面不能有溶液。

A. Tire wear increases with high speed.

B. The higher the speed is, the more fragile the tire becomes.

C. The tire blows out as the speed increases.

A. 打破了测量值的记录。

B. 打破了一个金属测量值的记录。

C. 对所有厚度测量值做记录。

A. A dash is usually longer than a hyphen but it is sometimes shown as hyphen with a space on each side.

B. A dash is usually longer than a connection symbol but it is sometimes shown as connection symbol with empty on each side.

C. A minus symbol is usually longer than a hyphen but it is sometimes shown as hyphen with a space on each side.

A. Apply two films of protective compound to prevent hydraulic fluid from damaging to the sealant.

B. Apply two layers of protective compound to prevent hydraulic fluid damage to the sealant.

C. Two coats of sealing compound should be applied to prevent hydraulic fluid damage from the sealant.

A. Propellers must be overhauled in a satisfactory shop which should be supplied by the propeller manufacturer in accordance with data.

B. Overhaul of propellers and the shop must meet the data of the propeller manufacturer.

C. Overhaul of propellers must be accomplished in a qualified shop in accordance with data supplied by the propeller manufacturer.

A. 电源系统讲的是发电、控制和向其他系统提供交流或直流电的组件和部件，包括发电机、继电器、变流器、电瓶等。

B. 电源系统讲的是发电、控制和向其他系统提供交流或直流电的组件和部件，包括发电机、继电器、整流器、电瓶等。

C. 电源系统讲的是发电、控制和向其他系统提供交流或直流电的组件和部件，包括发电机、继电器、静变流器、电瓶等。

A. The following synonyms are used interchangeably throughout this section and they are the sample of one system and device respectively.

B. The following antonyms are used interchangeably throughout this section and they present the same system and device partly.

C. The following acronyms are used interchangeably throughout this section and they represent the same system and device respectively.