A、 Because pressurized air can blow contamination away from the display unit, you should not use it to clean the holes behind the display unit in order to avoid damaging the equipment.
B、 Do not use compressed air to clean the holes on the rear of the display unit. Compressed air will push contamination into the display unit. This can cause damage to the equipment.
C、 Do not use compressed air to clean the holes behind the display unit, because it can blow contaminants into display unit which may be damaged.
答案：B
A、 Because pressurized air can blow contamination away from the display unit, you should not use it to clean the holes behind the display unit in order to avoid damaging the equipment.
B、 Do not use compressed air to clean the holes on the rear of the display unit. Compressed air will push contamination into the display unit. This can cause damage to the equipment.
C、 Do not use compressed air to clean the holes behind the display unit, because it can blow contaminants into display unit which may be damaged.
答案：B
A. A hard landing may be the result of shock loading of the engine.
B. Shock loading of an engine may result in a heavy landing.
C. A heavy landing can cause shock loading of the engine.
A. 对相对简单的部件可能不需要描述和操作说明、和/或排故信息。
B. 对简单部件不需要描述就可以操作和/或排故。
C. 对相对容易的部件可以不需要描述和操作，只需要排故信息。
A. 描述飞机燃油系统时，应解释燃油测量系统并阐述检测和校对的需要。
B. 描述飞机燃油系统时，应解释燃油计量系统并阐述检查和修正的需要。
C. 描述飞机燃油系统时，应说明燃油测量系统并阐述监控和校正的必要性。
A. The cover title shall be "Pilot＇s Operating Handbook" or "Polit＇s Operating Handbook and FAA Approved Airplane Flight Manual."
B. The name of the book might be "Pilot＇s Operating Handbook" or "FAA Approved Airplane Flight Manual."
C. The cover could be named as "Pilot＇s Operation Instruction" or "Pilot＇s Operation Instruction and FAA Approved Airplane Flight Instruction."
A. Sentence forms shall be simple and direct, avoiding the obvious, the elementary and discussions of theory except where essential for practical understanding and application.
B. Sentence forms shall be simple and direct, avoiding the obvious and the elementary, and omitting discussions of theory except where essential for practical understanding and application.
C. Sentence forms shall be simple and direct so as to avoid the obvious and the elementary, and to omit discussions of theory except where essential for practical understanding and application.
A. You can reassemble the horizontal stabilizer.
B. You can trim the horizontal stabilizer to the right angle.
C. You can adjust the incidence of the horizontal stabilizer.
A. Augment the pressure slowly (no less than one turn each minute).
B. Increase the pressure slowly (not more than one turn each minute).
C. Release the pressure slowly (not more than one turn each minute).
A. If this step can not stop the leakage, remove the actuator.
B. If this step is not enough to stop the leakage, change the motor.
C. If this step is not sufficient to stop the leakage, replace the actuator.
A. 包括永磁电机和分配器之间的接线，在这些系统中，它们不是单独的单元。
B. 包括发电机和分配器之间的接线，在这些系统中，它们是单独的单元。
C. 包括磁电机和分电器之间的接线，在这些系统中，它们是单独的单元。
A. 如果无线电信号不清晰，调整频率。
B. 如果电子信号不清楚，调整波长。
C. 如果广播信号不清楚，测试频率。
