(D) Knowing that a small proportion of baby boomers will not retire on
schedule does not significantly weaken the argument. The argument relies on
general estimates, not on exact numbers.
(E) If anything, this choice strengthens the argument. If these people are
unaware of these opportunities, it would be positive to convene to plan how to
reach them.
37.
(D).
Since the westbound train is blowing its horn, the westbound train is
“the source of the sound.” Therefore, the passengers on the westbound train
are traveling along with the source of the sound, and thus are neither
approaching the source nor receding from it. Hence, the westbound
passengers should hear the true pitch of the sound.
According to the passage, the passengers in the eastbound train are
approaching the source of the sound, the westbound train; the distance
between the eastbound passengers and the sound is decreasing. Therefore,
according to the given description of the Doppler effect, the eastbound
passengers should perceive a sound that is higher than the true pitch.
(A) Passengers in the eastbound train do not hear the true pitch of the horn;
passengers in the westbound train do.
(B) It is true that the westbound passengers hear the true pitch; the eastbound
passengers, however, hear a sound that is higher than the true pitch.
(C) Passengers in the eastbound train do not hear the true pitch of the horn;
passengers in the westbound train do.
Dostları ilə paylaş: