589、外界大气温度是指自由空气的静态温度,可从飞机上的温度指示或地面气象源获得,并根据仪器误差
和压缩性效应进行调整。

A. 　 This system does not supervise the normal channels of communication for this item.

B. 　 This system does not remove the normal Channels of communication for this item.

C. 　 This system does not supersede the nor mal channels of communication for this item.

A. 　B 为了重复步骤,耦合器问收发机要另一个调谐电源的简短降级。

B. 　耦合器问收发机要另一个调谐电源的简短降级目的是步骤简化。

C. 　对于校准步骤,耦合器向收发机要求另一个调谐电源的短暂降级。

A. 　 所有在此区域人员必须使用护目镜。

B. 　所有在此区域人员必须使用防护服。

C. 　所有在此区域人员必须使用呼吸设备。

A. 　本段还应说明,加上已建立的检查,其他检查也会被适航指南要求进行。

B. 　除去已确定的检查,本段落还应解释适航管理所要求的其他检查。

C. 　本段还应说明,除了既定的检查外,适航指令可能还要求进行其他检查。

A. 　 Make sure that the warning light turns on within 3 seconds.

B. 　 Make sure that the warning light is on for at least 3 seconds.

C. 　 Make sure that the warning light is turned on in no more than 3 seconds.

A. 　 Make sure that the coils of the oxygen hose do not rub together.

B. 　 lt is acceptable the coils of the chlorine hose rub together.

C. 　 Ensure that the coils of the nitrogen hose do not rub together.

A. 　 Operate the dimmer switch and make sure that the intensity of the light changes.

B. 　 Control the light knob to ensure that the light strength changes.

C. 　 Turn the light regulator on to adjust the luminous intensity.

A. 　 Do not use verbs that are general and vague.

B. 　 Do not use verbs that are normal and mixed.

C. 　 Do not use verbs that are usual and blended。

A. 　在表面放置一块透明塑料片。

B. 　 在外面放置一块复合材料薄片。

C. 　将一块强化塑料置于部件表面。

A. 　确保电动机操作顺滑。

B. 　确保发电机平稳运行。

C. 　确保生产者顺利操作。