【每日逻辑练习第二季【2-2】

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6'19''
ECDEE

Elisha728

15, 25986-!-item-!-188;#058&002914)
Some airlines allegedly reduce fares on certain routes to a level at which they lose money, in order to drive competitors off those routes.  However, this method of eliminating competition cannot be profitable in the long run.  Once an airline successfully implements this method, any attempt to recoup the earlier losses by charging high fares on that route for an extended period would only provide competitors with a better opportunity to undercut the airline's fares.
Which of the following, if true, most seriously weakens the argument?
(A) In some countries it is not illegal for a company to drive away competitors by selling a product below cost. Irrelevant
(B) Airline executives generally believe that a company that once underpriced its fares to drive away competitors is very likely to do so again if new competitors emerge-correct answer
If there is competitor, the reduced price will maintain, then no opportunity is left to the competitors-from a DN.
(C) As part of promotions designed to attract new customers, airlines sometimes reduce their ticket prices to below an economically sustainable level. Already stated in the passage
(D) On deciding to stop serving particular routes, most airlines shift resources to other routes rather than reduce the size of their operations. Irrelevant
(E) When airlines dramatically reduce their fares on a particular route, the total number of air passengers on that route increases greatly.
This is the most attractive wrong answer. The conclusion is about the consequences of airlines’ attempt to recoup the earlier losses by charging high fares. So what happens during the promotions period is irrelevant.

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19.(26678-!-item-!-188;#058&003277)
When an airplane is taken out of service for maintenance, it is often repainted as well, and during the repainting no other maintenance work can be done on the plane.  In order to reduce maintenance time, airline officials are considering using a new nontoxic plastic film instead of paint.  The film takes just as long to apply as paint does, but many other maintenance tasks can be carried out at the same time.

Which of the following, if true, is further evidence that using the film will help the airline officials achieve their goal?

(A) Unlike paint, the film gives a milky tone to certain colors. irrelevant
(B) At the end of its useful life, the film can be removed much more quickly than paint can.-thus save time, correct answer.
(C) The film can be applied only by technicians who have received special training. irrelevant
(D) The metal exteriors of airplanes have to be protected from high temperatures and caustic chemicals such as exhaust gases. irrelevant
(E) Even at speeds considerably higher than the normal speed of a passenger jet, the film remains securely attached. Irrelevant, the goal is about time-saving, security is out of scope.
Analysis:
The goal is to reduce maintenance time. Find out an option that prove that this film can really save time.