单项选择题


A．dies back
B．dies down
C．dies off
D．dies out
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A．movementB．temperatureC．pressureD．speed
A．movement
B．temperature
C．pressure
D．speed
单项选择题
From the passage we can infer that ______.
A．a successful airline in the 1980s meets the needs not only of the masses but also of the wealthy passengers
B．it is more comfortable to sit in the back of jet planes
C．business travelers dislike tourists
D．only by specializing in cheap flights can airlines avoid bankruptcy
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