139.If the fuel sample shows free water,drain the system.

A. 解除离合器可以防止启动发动机时发生意外。

B. 在启动发动机之前,脱开离合器。

C. 拆卸离合器,启动发动机。

A. 控制主燃料控制哪个仪表为发动机和推力调节器提供燃料。包括电线、滑轮、连杆等物品,也是燃料控制单元的部件。

B. 控制主燃料控制所有仪表为发动机和推力调节器提供燃料。包括杠杆、电缆、滑轮、连杆等物品,也是燃料控制单元的部件。

C. 主燃油控制系统能够计量送往发动机和加力燃烧室的燃油,其包括油门杆、钢索、滑轮、连杆等,这些也属于燃油控制组件。

D. C.主燃油控制系统能够计量送往发动机和加力燃烧室的燃油,其包括油门杆、钢索、滑轮、连杆等,这些也属于燃油控制组件。

A. 关闭流量控制和空调组件的关断活门。

B. 关闭空调组件的流量控制和关断活门。

C. 至于空调组件,关闭流量控制和关断活门。

A. It is very difficult to determine the effects of corrosion but,as the reports from the CAP inspections are received,the inspection times will be adjusted for any severe problems.

B. It is not easy to decide the affection of corrosion,when the reports from the CAP inspections are received,the inspection duration will be changed for any serious problems.

C. It is very hard to make the decision of the corrosion effects but,if the reports from the CAP inspections are obtained,the inspection times will be arranged in accordance with the severest problem.

A. Turn off all the unnecessary systems.

B. Disconnect all the systems which are not necessary for the test.

C. Disconnect all testing systems as necessary.

A. After finishing the following procedure,repair the upper flange.

B. Repair the lower flange first during the procedure that follows.

C. Repair the upper flange first during the following procedure.

A. Maximum Limiting speed Unsticks is the speed restrain which will not be intentionally surpassed in typical flight operations.V is communicated in knots and M in Mach Number.

B. Maximum Restriction Speed is the fastest a plane can fly without breaking the rules in normal flight.The speed is measured in knots and Mach Number.

C. Maximum Operating Limit Speed is the speed limit that may not be deliberately exceeded in normal flight operations.V is expressed in knots and M in Mach Number.

A. 解释如何避免和注意燃油消耗。

B. 解释如何避免和注意燃油污染。

C. 解释如何避免和注意燃油泄漏。

A. The airworthiness and safe operation of an airplane is assured if it's used as its original design purpose,properly inspected and carefully maintained.

B. The manufacturer is intended to utilize an airplane with sound inspection and maintenance practices because that is the basis for assuring the airplane remains airworthy and safe to operate.

C. The airplane is designed to be used as the manufacturer's intention.Users shall properly inspect the airplane and do sufficient maintenance to assure its airworthiness and operation safety.

A. 座椅小桌板上覆盖了一层塑料,以盖住经过处理的小桌板部分。

B. 塑料罩被安装在座椅导轨上,以覆盖暴露的导轨部分。

C. 塑料罩被安装在座椅导轨上,以覆盖经过处理的导轨部分。