There is a risk of fire.

A. 雷达天线的状况对其性能有重要影响。

B. 雷达罩的状况对其性能有重要影响。

C. 雷达的性能受到其状态的重要影响。

A. 通常，涡轮发动机转速计会以涡轮额定最大转速的百分比测量转速。

B. 涡轮发动机转速计通常会测量一个百分比转速，并与涡轮的正常最大转速比对。

C. 涡轮发动机转速计通常测量的速度与涡轮发动机最大名义转速成正比。

A. 拆下螺栓和止动块。

B. 拆下螺帽和挡板。

C. 拆下螺钉和螺帽。

A. 改变面板的位置。

B. 将面板移动到位。

C. 将脚蹬移动到位。

A. The power plant refers to the overall power package, including engine, air intake, bracket, cowling, nacelle, cowl flaps, cooling baffles, etc.

B. The power plant refers to the overall power package inclusive of engine, air intake, mount, cowling, scoops, cowl flaps, cooling baffles, etc.

C. The power plant refers to the overall power package inclusive of engine, air intake, mount, cowling, nacelle caps, fairing flaps, cooling baffles, etc.

A. The Boeing 747 symbolizes the beginning of a new ear in air transport.

B. The Boeing 747 is the first type of airplane in air transport.

C. Modern air transport started from the Boeing 747.

A. A pilot with certification authorized by Part 43 of the regulation can perform limited preventive maintenance.

B. According to Part 43 of the regulation, A pilot is certificated to perform limited preventative maintenance.

C. A certificated pilot is authorized by Part 43 of the regulation to perform limited preventive maintenance.

A. 涡轮发动机包括用于控制通过发动机空气流量的压缩机排气系统，用于发动机除冰的冷却空气系统，以及发动机启动系统。

B. 涡轮发动机包括压气机引气系统、空气冷却系统、热空气系统、发动机启动系统，其中压气机引气系统能控制通过发动机的空气流量，空气冷却系统和热空气系统用于发动机防冰。

C. 涡轮发动机包括控制通过发动机空气流量的压气机引气系统、空气冷却系统、用于发动机防冰的热空气系统和发动机启动系统。

A. As the depressurization of the alternate system, the hydraulic system A must be released to open the rudder hydraulic system selector valve and permit hydraulic fluid to flow to the rudder actuator below.

B. In order to depressurize standby system, the hydraulic system A must be depressurized to open the rudder hydraulic system selector valve and let hydraulic fluid flow to the lower rudder actuator.

C. Due to the depressurization of the alternate system, the hydraulic system A must be released to open the rudder hydraulic system selector valve and permit hydraulic fluid to flow to the bottom rudder actuator.

A. 所有改版数量和日期都应该从页面上删除。

B. 所有版本号和日期都应该从页面上删除。

C. 所有改版次数和日期都应从页面上删除。