A、 Ensure the oxygen tubes are completely clear. If oxygen is mixed with oil or compound together, it will form an explosives. Explosion can cause damage to equipment or injury to personnel.
B、 Make sure that the oxygen tubes are fully clean. Oxygen and oil or grease make an explosive mixture. An explosion can cause injury or death to personnel.
C、 Guarantee the oxygen tubes are completely free of dirts. Oxygen, oil and grease can combine to form an explosive oxides. Explosions can cause casualties.
答案：B
A、 Ensure the oxygen tubes are completely clear. If oxygen is mixed with oil or compound together, it will form an explosives. Explosion can cause damage to equipment or injury to personnel.
B、 Make sure that the oxygen tubes are fully clean. Oxygen and oil or grease make an explosive mixture. An explosion can cause injury or death to personnel.
C、 Guarantee the oxygen tubes are completely free of dirts. Oxygen, oil and grease can combine to form an explosive oxides. Explosions can cause casualties.
答案：B
A. Describe briefly the method of operation.
B. A brief demonstration of how to do this.
C. Operation method shall be briefly presented.
A. 一些类型的飞机（如涡轮螺旋桨飞机）在确定VMCA时，可能受自动螺旋桨桨矩控制装置的影响，因飞机在降低发动机功率模拟一发失效时遇到的阻力要比实际一发失效时遇到的阻力更大。
B. 某些类型的飞机（例如涡轮螺旋桨驱动的）可以用自动螺旋桨桨距控制装置来确定VMCA，该装置可能比不工作的发动机具有更大的阻力，以模拟发动机故障。
C. 一些类型的飞机（如涡轮螺旋桨飞机）可能有自动螺旋桨间距控制装置确定的VMCA，与不工作的发动机相比，在模拟发动机故障降低功率运行时发动机可能有更大的阻力。
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. 这些测试可能需要额外的地面支持设备，应比操作测试更具体和详细。
B. 这些试验可能需要增加地面支持设备，应比操作测试更专业和详实。
C. 这些测试可能需要提供专门的地面支撑设备，应比功能试验更特殊和详细。
A. The testing machine will run the tests in manual mode.
B. The test set will automatically run the tests.
C. The test apparatus will give the test parameter automatically.
A. If you use solvent in a closed space, make sure that there is good airflow in the work area.
B. When using composite in confined space, make sure it has good ventilation.
C. You can not use sealant in enclosed space on condition that there is no good ventilation.
A. It is necessary to replace the fitter.
B. It is mandatory to replace the filter.
C. It is prohibited to replace the filler.
A. 航空器拖动和滑行时任何可能遇到的情况的说明在”拖动与滑行”这个标题下。
B. 航空器在任何可能遇到的情况下如何拖动和滑行的说明在”拖动与滑行”这个标题下。
C. 航空器应该服从什么样的条件进行滑行和拖动的说明在”拖动与滑行”这个标题下。
A. Detection and coding systems shall be used so that it＇s easy to isolate faults, repair routes and replace the components.
B. You should use the detecting and coding system that can help to remove faults, repair lines and change the components.
C. To facilitate troubleshooting, repair of circuits, and replacement of components, an identification and coding system should be used.
A. Operator is in charge of the maintenance of the handbook.
B. The handbook should be kept current by the operator.
C. The operator should store the handbook in a proper status.
