A、 If the pressure increases too much because of a downstream blockage, the relief valve opens.
B、 If the pressure decreases too much because of a downstream broken, the relief valve opens.
C、 If the pressure increases too much because of a upstream leak, the relief valve opens.
答案：A
A、 If the pressure increases too much because of a downstream blockage, the relief valve opens.
B、 If the pressure decreases too much because of a downstream broken, the relief valve opens.
C、 If the pressure increases too much because of a upstream leak, the relief valve opens.
答案：A
A. Warnings, cautions and notes may be used to highlight or emphasize important points.
B. Cautions, warnings and notes may be used to highlight or emphasize important points.
C. Warnings, cautions and notes can be used to delight or address important points.
A. 确保放置正确尺寸的部件
B. 确保更换的部件尺寸正确
C. 确保更换的部件位置正确
A. The pilot must manually start this deflation cycle;
B. The pilot must automatically start this deflation cycle;
C. The pilot must manually start this inflation cycle;
A. Leave the solution for one hour, then stir it up.
B. Do not use the solution unless you shake it for one hour.
C. After agitation, allow the solution to stand for one hour.
A. 检查开口是否有从边角开始的裂纹。
B. 检查转角处的裂纹是否从这里开始。
C. 检查裂纹的开口是否有从边角开始的。
A. Rapid operation of the accelerometer can cause unexpected movement of the vertical stabilizer.
B. Accidental movement of the compass can cause unwanted operation of the oriental stabilizer.
C. Sudden operation of the gyro can cause unwanted movement of the horizontal stabilizer.
A. Make sure that the warning light turns on within 3 seconds.
B. Make sure that the warning light is on for at least 3 seconds.
C. Make sure that the warning light is turned on in no more than 3 seconds.
A. Your skin and lungs can be protected.
B. Your skin and lungs can be harmed.
C. Your skin and lungs can be harmed suddenly.
A. 在每一页的顶部打印页码和发布或者修订日期。
B. 在每一页的底部打印页码以及发布或者修订日期。
C. 在每一页的底部打印页码和修订发布日期。
A. These tests should not use special equipment or facilities that are not installed on the aircraft.These tests should be similar to the tests performed by the flight crews.
B. 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.
C. These test should only use the equipment or facilities on the aircraft. These tests should be able to perform by the flight crews.
