单项选择题

One criticism against many international airlines is that they have ______.

A．catered for the more wealthy people
B．given preferential treatment to executive clients
C．only met the needs of the regular traveler
D．marketed their service with the quantity of the travelers in mind
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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
单项选择题
The author indicates that a passenger-side air bag ______.
A．might not be dangerous if switched off
B．is designed for the safety of children
C．is discharged at 320 km/h and will not triggered by other factors
D．is not working if a child sits in the seat
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