填空题

According to the 2003 statistics, the number of injuries and illnesses in transportation industry is relatively higher than that in private industry chiefly because the former has undergone more transportation accidents.

【参考答案】

Y
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The low-fare carriers have usually offered shorter flights between limited number of cities, so passengers taking these flights will never have the chance to travel from an American city to any other city in another continent.
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A．orB．andC．butD．while
A．or
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