安装座垫之前先安装座椅

A. A maximum distance of 50 feet is required between consumable materials and the work area.

B. Keep flammable materials at a minimum distance of 50 feet from the work area.

C. Explosive materials must be kept at least 50 feet away from the work area.

A. The tune time for a frequency not in memory is 2 to 4 seconds typical, 7 seconds maximum.

B. The adjust time for a frequency not in memory is 2 to 4 seconds typical, 7 seconds maximum.

C. The tune time for a frequency not in memory is 2 to 4 seconds common, 7 seconds maximum.

A. A servo system is a device that has the ability to carry out an order and give a response to fufill five basic requirements.

B. A servo system is a device that has the ability to carry out an order and give a response to orders. It can finish five basic requirements.

C. A servo system is a device that has the ability to respond to and carry out an order which must be able to fufill five basic requirements.

A. Materials used to repair layered structures must keep the rigidity, gravity, aerodynamic or electronic properties of the original assembly.

B. The materials used in the repair of laminate structures must preserve the strength, weight, aerodynamic characteristics, or electrical properties of the original assembly.

C. Materials that are used for fixing the layer structures must maintain the intensity, weight, aerodynamic or electrical properties of the original assembly.

A. 连接接头是机翼上用于连接机身、短舱/挂架和起落架以及支撑机翼内设备的接头。

B. 附属装置是指机翼上用于将机身、机舱/塔架和起落架固定在机翼上以及用于支持机翼内设备的装置。

C. 附加配件是机翼上的配件，用于将机身、机舱/挂架和起落架连接到机翼上，并用于支持机翼内的设备。

A. 该控制组件安装在机身尾部。

B. 该控制组件安装在驾驶舱后部。

C. 该控制组件位置在驾驶舱底部。

A. These tests should only use the equipment or facilities installed on the aircraft. These tests should be able to perform by the flight crews.

B. These tests should not use the special equipment or facilities that are not installed on the aircraft. These tests should be similar to the tests performed by the flight crews.

C. These tests should require the equipment or facilities installed on the aircraft rather than the special ones and should be replaceable by the tests accomplished by the flight crews.

A. 本章中任何或所有部件的翻修必须使用部件制造商提供的数据完成。

B. 任何或所有部件的销售必须提供本章有关的部件生产商数据。

C. 本章中任何或所有部件的翻新必须由部件生产商完成并提供数据。

A. The tops of the bolt heads must not be more than 5 MM above the plate.

B. The bottoms of the bolt heads can be more than 5 MM above the plate.

C. 5 MM is permitted for the tops of the bolt heads below the plate.

A. Text shall be as brief and concise as practicable.

B. The text is simple and clear for readers.

C. When preparing the text, it must be easy and relevant.