2850.The minimum jack closed height must be less than the distance between the fitting and the ground when the aircraft is on its wheels.

A. 应提供结冰条件下最多保持空中等待程序运行 45 分钟的建议。

B. 建议在结冰条件下保持空中交通管制运行 45 分钟。

C. 应提供在结冰条件下 ATC 保持运行长达 45 分钟的建议。

A. 飞机的维护信息必须与制造商提供的最近信息一致。

B. 飞机可根据制造商发布的最新信息进行维修。

C. 根据厂家最近出版的维修信息对飞机进行修理。

A. Set the width of the control rod as necessary.

B. Set the length of the control rod as necessary.

C. Set the height of the control rod as necessary.

A. Adjust the lever intentionally and reset the system to the neutral position.

B. Move the lever before setting the system to the neutral position again.

C. In case of an inadvertent lever movement,return the system to the neutral position again.

A. 在某些情况下,导线是以颜色编码的,这些情况应在接线图上标明。

B. 在某些情况下,导线的颜色是喷涂上去的,在线路图上标出了。

C. 在某些情况下,线路图上会标出以颜色区分的导线分布情况。

A. The purpose of radar is to obtain,process and display image information.

B. Grasping,processing and displaying grafic information is the function of radom.

C. The purpose of radar is to transmit,process and caculate image information.

A. For "emergency",the related failure should be responded immediately,for example,the total engine failure,fire or smoke,sudden cabin pressure lost.

B. An "Emergency" almost including a serious failure that requires later response,such as a total engines failure,flame out or smoke,or rapid cabin pressurization.

C. For "emergency",the related failure should be treated immediately,for example,the total engine is not malfunctioning,fire or smoke,sudden cabin pressure lost.

A. The basis for assuring an airplane remains airworthy and safe to operate is to combine the manufacturer's requirements with sound inspection and maintenance practices.

B. To ensure airworthiness and safe operation of an airplane,it is essential to follow themanufacturer's instructions in the utilization of airplane,and perform sound inspection and maintenance practices as well.

C. Airworthiness and safe operation are fundamental to aircraft utilization as required bythe manufacturer,so sound inspection and maintenance practices are carried out.

D. C.Airworthiness and safe operation are fundamental to aircraft utilization as required bythe manufacturer,so sound inspection and maintenance practices are carried out.

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. 将容器置于排放活门下方。

B. 将排放活门置于油箱下方。

C. 将容器从排放活门下方移开。