17: It is crucially important to farmers that the herbicides they use
to control weeds not (?) damage their crops. One very effective
herbicide is safe for corn, but soybeans are damaged even by
the herbicide’s residue, which remains in the soil more than a year
after the herbicide is applied. Soybeans and corn are not sown
together in the same filed; nevertheless, most farmers are
reluctant to use the herbicide on their corn.
Which of the following, if true, provides the strongest justification for
the farmers’ reluctance?
A: The residue of the herbicide in the soil a year after application is
not enough to control most weeds effectively.
B: To maintain the nutrients in the soil, corn and soybeans are often
planted in a field in alternate years.
C: The demand for soybeans is growing faster than is the demand for corn.
D: For maximum yield, soybean plants are grown closer together to each other than are corn plants.
E: The application of herbicides is less critical for soybean than for corn crops.
(B??)
19: Sonya: The government of Copeland is raising the cigarette
tax. Copeland’s cigarette prices will
still be reasonably low, so cigarette consumption will probably
not be affected much. Consequently, government revenue from
the tax will increase.
Raoul: True, smoking is unlikely to decrease, because Copeland's
cigarette prices will still not be high. They will, however, no longer be
the lowest in the region, so we might begin to see substantial illegal
sales of smuggled cigarettes in Copeland.
Raoul responds to Sonya’s argument by doing which of the following?
A: Questioning the support for Sonya’s conclusion by distinguishing carefully between No change and no decrease
B: calling Sonya’s conclusion into question by pointing to a possible
effect of a certain change.
C: Arguing that Sonya’s conclusion would be better supported if
Sonya could cite a precedent for what she predicts will happen.
D: showing that a cause that Sonya claims will be producing a certain
effect is not the only cause that could produce that effect
E: pointing out that a certain initiative is not bold enough to have the predicts it will have
(B???)
29: Rail Executive: Five years ago we discontinued train service
between Lamberton and its suburbs because low ridership caused
total fares collected to be substantially lower than the cost of operating
the service. it is true that recent population growth in the suburban communities suggests increased potential ridership, nevertheless since
most of the newer residents own automobiles, restoring the train service
this year would still result in serious deficits.
Which of the following, if true casts the most serious doubt on the rail executive’s argument?
A: once train service along a given route has been discontinued, there
are substantial start-up costs associated with restoring service along
that route.
B: most of the new residents of Lumberton’s suburbs do not need
to travel into Lamberton regularly for shopping or recreation
C: if train service were restored this with increased hours of service
there would not be an increase in total ridership
D: A survey conducted last year showed that few people living
in Lamberton or its suburbs support increased public funding
for mass transportation
E: Recently there have been sharp increases in parking fees in
Lamberton and in highway tolls on major commuter routes. (E)
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发表于 2005-7-15 13:05:00
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