According to the author, the deeper problems of aviation industry______. One of the facts that reflect the primitiveness of air

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问题 According to the author, the deeper problems of aviation industry______.
One of the facts that reflect the primitiveness of airline industry is ______.

选项 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 carrier
D、it is still an industry of comparatively low profits

答案C

解析 这是一道细节题。根据第二段后半部分内容可认定答案。
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