If the airspace around centrally located airports were restricted to commercial airliners and only those private planes equipped with radar, most of the private-plane traffic would be forced to sue outlying airfields. Such a reduction in the amount of private-plane traffic would reduce the risk of midair collision around the centrally located airports.
The conclusion draw in the first sentence depends on which of the following assumptions?
(a)Outlying airfields would be as convenient as centrally located airports for most pilots of private planes.
(b)Most outlying airfields are not equipped to handle commercial-airline traffic.
(c)Most private planes that use centrally located airports are not equipped with radar.
(d)Commercial airliners are at greater risk of becoming involved in midair collisions than are private planes.
(e)A reduction in the risk of midair collision would eventually lead to increases in commercial-airline traffic.
这道题的答案是C，但是我理解不了C选项是怎么填补第一个结论的GAP的，望高人指点，感谢！
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发表于 2013-1-6 11:16:16
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