题目内容
（请给出正确答案）
[主观题]
One of the facts that reflects the primitiveness of airline industry is that ______.A．its
One of the facts that reflects the primitiveness of airline industry is that ______.
A．its history is much longer than that of car industry
B．it is composed of international and domestic carriers
C．its market is divided by many a relatively small carriers
D．it is still an industry of comparatively low profits
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