A、 Clean all lint, dust and debris from the ventilation holes located on the aft side of the captain＇s primary flight, navigation, and center lower engine display units.
B、 Clean the vent holes behind the captain＇s primary flight, navigation and lower middle engine display units which are blocked by lint, dust and debris.
C、 The captain＇s primary flight, navigation, and center lower engine display units must be cleaned since the ventilation holes behind them are clogged by lint, dust and debris.
答案：A
A、 Clean all lint, dust and debris from the ventilation holes located on the aft side of the captain＇s primary flight, navigation, and center lower engine display units.
B、 Clean the vent holes behind the captain＇s primary flight, navigation and lower middle engine display units which are blocked by lint, dust and debris.
C、 The captain＇s primary flight, navigation, and center lower engine display units must be cleaned since the ventilation holes behind them are clogged by lint, dust and debris.
答案：A
A. For normal operations, make sure the pressure relief valve is closed. An open pressure relief valve is a symptom of a problem in the fuel vent system.
B. For normal operations, make sure the shutoff relief valve works. If you open pressure relief valve, that indicates a problem in the fuel vent system.
C. For normal operations, make sure you close the pressure relief valve. If you leave it open, a problem will be shown in the fuel vent system.
A. During ground speed braking, all the spoiler panels are activated.
B. During ground deceleration, all the spoiler panels are closed.
C. During ground speed stabilizes, most of the pedals are activated.
A. Examine the seal for defects.
B. Check the abnormality of the sealant.
C. Inspect whether there are the defaults in the solvent.
A. Isolate the section that is causing the trouble.
B. Separate the part that is causing the fault.
C. Identify the part that is causing the error.
A. 使复合材料变干燥。
B. 发出脱水的指令。
C. 使化合物变干。
A. 这些作动器控制副翼和升降舵使他们产生运动，以便控制飞机的飞行路径。
B. 这些作动器控制副翼和升降舵的运动，副翼和升降舵控制飞机的飞行路径。
C. 飞机的飞行路径是通过作动器让副翼和升降舵产生运动来控制的。
A. A certificated pilot who owns or operates an airplane not used as an air carrier is authorized by FAR Part 43 to perform limited preventive maintenance on his airplane.
B. A certificated pilot who owns or operates an airplane that is not airworthy can perform limited predictive maintenance on his airplane authorized by FAR Part 43.
C. A licensed pilot authorized by FAR Part 43 who owns or operates an airplane not used to operate can perform time-limited maintenance on his airplane.
A. 本部分必须确定每个（部件的）指导更换时间，结构检查间隔以及型号合格证要求的相关结构检查程序。
B. 本部分必须确定每个强制的型号合格证要求的（部件）更换时间、结构检查间隔以及结构检查对应的检查程序。
C. 本部分必须明确型号合格证要求的每个（部件的）强制更换时间，结构检查间隔以及相应的结构检查程序。
A. 我们在这个产品中不使用添加剂。
B. 我们不使用附属产品。
C. 我们在此生产过程中不使用粘接剂
A. Tire wear increases with high speed.
B. The higher the speed is, the more fragile the tire becomes.
C. The tire blows out as the speed increases.
