2470.改变频率并记录结果。

A. 说明如何挖掘潜在的问题,以及出现不良功能时应该怎么办。

B. 解释如何识别即将出现的问题,以及发生故障时应采取的措施。

C. 说明如何确认多发问题,以及如果故障发生应该做什么。

A. If you use cleaner in a closed space,make sure that there is ventilation in the work area.

B. Ensure that there is adequate airflow in the work area when using solvent in an enclosed space.

C. If you use solvent in a confined space,make sure that there is restricted airflow in the work area.

A. Rapid operation of the accelerometer can cause unexpected movement of the vertical stabilizer.

B. Accidental movement of the compass can cause unwanted operation of the oriental stabilizer.

C. Sudden operation of the gyro can cause unwanted movement of the horizontal stabilizer.

A. 总体来说,作者可以使用字典中的典型词汇作为核心词汇。

B. 基本上,作者可以使用字典中批准的词汇作为核心词汇。

C. 基本上,作者从字典中选用的词汇都是核心词汇。

A. The operation of new generation aircraft has adopted the operation method of damage tolerance.

B. The damage tolerance design method is applicable to the new type aircraft.

C. The design concept of damage tolerance was successfully applied to the design of new generation aircraft.

A. 供应足够容量和尺寸的容器。

B. 供应足够容量和直径的容器。

C. 提供符合规范的容器和量尺。

A. 这个手册需要花费两个小时读完。

B. 做这个程序需要两个小时。

C. 两个小时必须完成这个程序。

A. 球型接头很少应用于现代飞机,因为它减少了应力。

B. 球型接头很少应用于现代飞机,因为它减少了摩擦力。

C. 因为可以减小摩擦力,滚珠轴承广泛应用于现代飞机。

A. Take the oxygen mask in a hurry to start the flow of oxygen.

B. Pull the oxygen mask with a sudden movement to start the flow of oxygen.

C. Pull the oxygen mask in a must to start the flow of oxygen.

A. 给坦克更换新的燃油。

B. 用新的滑油灌洗油箱。

C. 给油箱注入新的滑油。