These devices are used to stabilize the aircraft while on the ground and prevent damage by ground contact. Includes items such as shock strut, skid blocks, wheels, etc.

A. Pressurization of the pneumatic crossover manifold and use of an external air source connected to the air charging valve manifold to pressurize the reservoirs for ground maintenance is the second method.

B. You can use the second method to pressurize crossover manifold and use an external air source connected to the air charging valve manifold to pressurize the reservoirs for ground maintenance.

C. The second method is that it is not necessary to pressurize the pneumatic crossover manifold but to use an external air source connected to the air charging valve manifold to pressurize the reservoirs for ground maintenance.

A. When you change a word, always assure that the alternative you choose does not change the sequence of the sentence.

B. When you replace a word, always make sure that the alternative you select does not change the meaning of the sentence.

C. When you exchange a word, always ensure that the alternative you pick does not change the order of the sentence.

A. The Design Authority is responsible for approving and changing the repair procedure.

B. Any alteration to this repair procedure must get verbal approval of the Design Authority.

C. If you change this repair procedure, get approval of the Design Authority.

A. This is the maximum portion of flammable vapors in air. If the portion is bigger, when an ignition source touched the gas, it would cause the fire to be diffused.

B. This is the minimum volume of flammable vapors. If the volume is lower, when the gas contacted with an ignition source, the fire would not come out.

C. This is the minimum density of flammable vapors in air. If the density was lower, when an ignition source touched the gas, it would not cause the spread of flame.

A. Give precise instructions for using emergency exits.

B. Give special directions for using urgent exits.

C. Give accurate data for using urgent exits.

A. 只要发现的问题得到彻底解决，就会向申请方颁发补充型号合格证。

B. 如果发现的问题得不到彻底解决，就不会向申请方颁发型号合格证。

C. 型号合格证的颁发与否取决于是否彻底解决了发现的问题。

A. 批准的修理部分应包括执行修理所需的工艺和技术。

B. 批准的修理部分应包括科学和技术，需要进行修理。

C. 申报的加工部分应包括进行加工所需的措施和技术。

A. An inoperative pump will be identified by a decontaminated filter.

B. Contaminated filter elements indicate a defective pump.

C. If filter elements are clean , the filter elements are inoperative.

A. 确保这片区域的设备都清空了。

B. 确保这个区域的设备都已打扫干净。

C. 确保那台设备在这个区域里是收好的。

A. 只有组件磨损时，才可进行更换。

B. 更换磨损超标的组件。

C. 更换组件会导致损坏加剧。