请教几个偶想不通的LSAT黄皮书上的问题(共四题）
#1:
The ancient Romans understood the principles of water power very well and in some outlying parts of their empire they made extensive and excellent use of water as an energy sources. This makes it all the more striking that the Romans made do without water power in dominated by large cities.
Which one of the following, if true , contributes most to an explanation of the difference described above in the Romans use of water power?
(A) The ancient Romans were adept at constructing and maintaining aqueducts that could carry quantities of water sufficient to supply large cities over considerable distances
(B) In the areas in which water power was not used water flow in rivers and streams was substantial throughout the year but nevertheless exhibited some seasonal variation
(C) Water power was relatively vulnerable to sabotage but any damage could be quickly and inexpensively repaired
(D) In most areas to which the use of water power was not extended other more traditional sources of energy continued to be used
(E) In heavily populated areas the introduction of water power would have been certain to cause social unrest by depriving large numbers of people of their livelihood
#2
P168
Psychotherapy has been described as a form of moral coercion. However, when people are coerced, their ability to make choices is restricted, and the goal of psychotherapy is to enhance people's ability to make choices. Hence, psychotherapy cannot possibly be a form of coercion.
Which one of the following describes a flaw in the argument?
(A) The position being augured against is redefined unfairly in order to make it n easier target.
(B) Psychotherapy is unfairly criticized for having a single goal, rather than having many complex goals.
(C) No allowance is made for the fact that the practice or results of psychotherapy might run counter to its goals.
(D) The goals of psychotherapy are taken to justify any means that are used to achieve those goals.
(E) It offers n argument to show that moral coercion is always undesirable.
# 3
P168
The true scientific significance of a group of unusual fossils discovered by the paleontologist Charles Walcott is more likely to be reflected in a recent classification than it was in Walcott's own classification, Walcott was, after all, a prominent member of the scientific establishment. His classifications are thus unlikely to have done anything but confirm what established science had already taken to be true.
Which one of the following most accurately describes a questionable technique used in the argument?
(A) It draws conclusions about the merit of a position and about the content of that position from evidence about the position's source.
(B) It cites two prices of evidence, each of which is both questionable and unverifiable, and uses this evidence to support its conclusions.
(C) It bases a conclusion on two premises that contradict each other and minimizes this contradiction by the vagueness of the terms employed.
(D) It attempts to establish the validity of a claim, which is otherwise unsupported, by denying the truth of the opposite of that claim.
(E) It analyzes the past on the basis of social and political categories that properly apply only to the present and uses the results of this analysis to support its conclusion.
#4
P200
In clinical trials of new medicines, half of the subjects receive the drug being tested and half receive a physiologically inert substance ?a placebo. Trials are designed with the intention that neither subjects nor experimenters will find out which subjects are actually being given the drug being tested. However, this intention is frequently frustrated because ____.
Which one of the following, if true, most appropriately completes the explanation?
(A) often the subjects who receive the drug being tested develop symptoms that the experimenters recognize as side effects of the physiologically active drug
(B) subjects who believe they are receiving the drug being tested often display improvements in their conditions regardless of whether what is administered to them is physiologically active or not
(C) in general, when the trial is intended to establish the experimental drug's safety rather than its effectiveness, all of the subjects are healthy
(D) when a trial runs a long time, few of the experimenters will work on it from inception to conclusion
(E) the people who are subjects for clinical trials must, by law, be volunteers and must be informed of the possibility that they will receive a placebo |
