2019.Put safety barriers at the entrance to the work area.

A. Before you use a word,read its definition in the approved meaning column of the dictionary.

B. Before you use a word,read its approved meaning in the definition column of the dictionary.

C. Before you use a word,read its meaning in the approved column of the dictionary definition.

A. 螺柱的凹陷不得超过 5mm。

B. 螺柱的突起不得超过 5mm。

C. 螺纹的长度不得超过 5mm。

A. 拧紧螺栓时使用不同的措辞。

B. 使用不同的扳手拧紧螺栓。

C. 拧螺栓时使用不同的扭矩。

A. 在修订文件时,应提供修订页和相关的有效列表。

B. 在修改基本文件时,应提供相应的修订页面和相关的有效页面列表。

C. 当修改基本文件时,应尽可能提供适当的修改页面和有关的有效页面清单。

A. If the tire temperature is unusually high,open the valve.

B. If the tyre pressure is insufficiently high,open the valve.

C. If the tire pressure is unusually high,open the valve.

A. Use a minimum of 20 words in each sentence.

B. Use a maximum of 20 words in each sentence.

C. Use more than 20 words in each sentence.

A. 位于连接发电机和驱动组件的法兰上的端口,使滑油在恒定转速驱动器和可用发电机之间流动。

B. 位于连接发电机和驱动组件的连接处的端口,使滑油产生了在变速驱动器和发电机之间流动的可能性。

C. 端口位于连接发电机和驱动组件的法兰上,使滑油可以在恒速驱动器和发电机之间流动。

D. C.端口位于连接发电机和驱动组件的法兰上,使滑油可以在恒速驱动器和发电机之间流动。

A. Recommending or requiring life limited components is on the right side of the page in an appropriate margin.

B. Recommended or required retirement time of life limited parts is on the right side of the page in an appropriate space.

C. The required retirement time of life limited components is located on the right side ofan appropriate space.

A. 如果危险被含糊描述,人员在执行任务时要了解风险,并更加小心。

B. 危险是否被清楚说明,以致于执行任务的人是否有必要了解风险,并更加小心。

C. 如果清楚说明了危险,执行任务的人就会了解风险,且更加小心。

A. A small child should sit in an unlimited seat.

B. A small child needs to sit in a seat with safety device.

C. A small child could sit in an adult seat.