求教Manhattan上的一道逻辑题

gmgmwll

John was flying from San Francisco to New York with a connecting flight in
Chicago on the same airline. Chicago's airport is one of the largest in the world,
consisting of several small stand-alone terminals connected by trams, John's plane
arrived on time. John was positive he would make his connecdngfllght thirty minutes
later, because _
Which of the following most logically completes the argument above?
(A) John's airline is known for always being on time
(B) a number of other passengers on John's first flight were also scheduled to take
John's connecting flight
(C) at the airport in Chicago, airlines always fly in and out of the same terminal
(D)John knew there was another flight to New York scheduled for one hour after
the connecting flight he was scheduled to take
(E) the airline generally closes the doors of a particular flight ten minutes before it is
scheduled to take off
正确答案是C
意思是在same terminal 就可以节省时间了。 但是我不明白的是题目中的30分钟是用什么衡量的呢？
有大仙给讲讲这道题吗？
万分感谢！！

kazemi

其他都无关吧...

gourmettsu

加强题只要加强就好了，这个是最有可能使结论成立的，但也没加强到100%，所以30这个数字应该就可以当个约数浮云了吧···

我的理解哈

gmgmwll

John was positive he would make his connecdngfllght thirty minutes
later 这句话具体是什么意思呢？

gmgmwll

那如果不表明30分钟是长是短的话 我怎么知道要加强的对象呢？谢谢大家的解答～

gourmettsu

我觉得这句话的意思和he was positive that he would catch up his connecting flight是一样的
不管是30分钟之后，还是40分钟之后，对于加强题，其实也就是百分比的区别而已

而且我觉得不能对30分钟进行衡量，因为它可以相对长也可以相对短，在这道题里它的相对长短对加强没影响，只要保证这个30能实现就行了

dhuang123

30分钟是指John相信自己能在30分钟内乘坐下一班飞机，要不是在同一个terminal, 在chicago这么大的机场是赶不上的。文章也提到了这些。