【每日逻辑练习第二季【2-2】

ugly5552000

1/Background: the navigation systems which are installed on planes and play important role during the landing of planes are easily to be interfered.
Premise: recently, when a passage turned on a laptop computer during the landing of a plane, the navigation system happened to show some problem, so the electronic devices carried onto planes by passengers put the navigation at risk.
Prephrase: the problem during landing was by the storm weather condition.
E
A: it shows that the laptop computer has affects on navigation system
B: since all electronic devices emit radiation to interfere with navigation system, the argument is strengthened.
C: no electronic devices, no problems with the system, support
D: the system is in the radiation range of the electronic devices.
E: irrelevant, so least supports the argument
2/Background: once an severe winter occurred after the eruption of a volcano.
Premise: it is the eruption of volcano makes the atmosphere to become cooler.
Prephrase: after 1984, the volcano erupted several times, however, the atmosphere did not change after the eruption.
C
A: irrelevant
B: strong connection between eruption of volcano and rainy season supports the argument
C: after volcanic eruption, the temperature is still high, weakens the argument
D: irrelevant
E: supports
3/Background: when microwave ovens are not in use, the built-in clock still consume electricity. The clock each consume about 45 kilowatt-hours per year.
Premise: the microwave ovens without built-in clock consume 45 kilowatt-hours per year less than those with built-in clock.
Prephrase: the total hours per year the two kinds of microwave ovens are in use for are equal.
D
A: if it is true, the result of electrical consumption of built-in clock cannot be measured.
B: irrelevant
C: irrelevant
D: right, it rules out the factor which may trigger bias
E: irrelevant
4/Background: some airlines drive their competitors off the short routes by setting the fares of the routs lower the costs, but the strategy is not profitable in long routes.
Premise: once an airline implements the method, their attempts of recouping the earlier losses by charging high fares on that route for an extended period would provide competitors the chances to undercut the fares.
Prephrase: the high fares is accompanied with more service, which makes passengers feel worthwhile.
B
A: irrelevant
B: if there is competitor, the reduced price will maintain, then no opportunity is left to the competitors.
C: irrelevant, it merely depicts the promotion of tickets
D: irrelevant
E: irrelevant
5/Background: when an airplane is being repainted, no other maintenance work can be carried out on the same time.
Premise: the official plans to replace paint with a plastic film which not only sustain as long as the paint and allows other maintenance jobs to be carried out at the same time.
Prephrase: the new film is easy to acquire.
B
A: irrelevant
B: not only the film is equally easy-use as the paint, but also can it allow other maintenance tasks to be done at the same time
C: weaken
D: weaken
E: the point is “maintenance”, not security