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题库 / OG12-CR-118
Northern Air has dozens of flights daily into and out of Belleville Airport, which is highly congested. Northern Air depends for its success on economy and quick turnaround and consequently is planning to replace its large planes with Skybuses, whose novel aerodynamic design is extremely fuel efficient. The Skybus' fuel efficiency results in both lower fuel costs and reduced time spent refueling.
Which of the following, if true, could present the most serious disadvantage for Northern Air in replacing their large planes with Skybuses?
The Skybus would enable Northern Air to schedule direct flights to destinations that currently require stops for refueling.
Aviation fuel is projected to decline in price over the next several years.
The fuel efficiency of the Skybus would enable Northern Air to eliminate refueling at some of its destinations, but several mechanics would lose their jobs.
None of Northern Air's competitors that use Belleville Airport are considering buying Skybuses.
The aerodynamic design of the Skybus causes turbulence behind it when taking off that forces other planes on the runway to delay their takeoffs.
手段
Northern Air换新的Skybuses→省油、省钱、省时间
削弱（说换新的Skybuses的缺点）
A、Skybuses可以一口气飞完以前需要停下来加油的航程，加强
B、油价会下降，无关
C、虽然Skybuses可以省下停下换油的时间，但会让机械师失业，无关（没说是NA自己的机械师）
D、NA的竞争者不考虑换新Skybuses，无关
E、Skybuses会引起起飞时的骚乱，造成延误，削弱（说明Skybuses并不省时间）
方案的可行性差
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Northern Air依赖quick turnaround获得成功。现在计划将飞机型号换成Skybuses，更节省油费和加油时间更快。问削弱
choice e, sky的空气动力设计在起飞时候会引起turbulence，使得跑道上的其他飞机延误起飞。-> 因此使得Belleville Airport运转效率更低下，也影响了Northern Air自己的飞机效率
宗旨： economy and quick turnaround
E选项直接就否决了 ， 取代后的后果就是 制造turbulence...从而使本来就拥挤的机场更加不堪了...
问方案的否定性副作用。
Correct. The delay caused by Skybus' turbulence will impact Northern Air because we know that the airport is highly congested. This delay, will thus, affect Northern Air's quick turnaround time.