36. 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.
答案是C。
问：文段说only those private planes equipped with radar, most of the private-plane traffic would be forced to sue outlying airfields. 我搞不懂p-plane和radar的关系了。既然规范了装了radar的p-plane后，大部分就不停机场了，那为什么答案又说前提是most p-planes没有装呢？不是应该前提是大部分都装了吗？ 还是题目的意思是p-planes分两种，有的装了radar有的没装呢？
请大伙指教 | 
