精练 2. 19s background information:Most antidepressant drugs cause weight gain.
Premise: While dieting can help reduce the amount of weight gained .
Conclusion:while taking such antidepressants, some weight gain is unlikely to be preventable.
Answer:C (A) A physician should not prescribe any antidepressant drug for a patient if that patient is overweight.---------the “any” is too absolute, the background information of the argument just say “most”. (B) People who are trying to lose weight should not ask their doctors for an antidepressant drug.----------------people can dieting. (C) At least some patients taking antidepressant drugs gain weight as a result of taking them.---------------correct.
(D) The weight gain experienced by patients taking antidepressant drugs should be attributed to lack of dieting.--------------people taking the weight gain-causing antidepressants will gain weight regardless of whether they diet.
(E) All patients taking antidepressant drugs should diet to maintain their weight.----------too absolute
PREP 练习 57. (34655-!-item-!-188;#058&007580)26S Roland: The alarming fact is that 90 percent of the people in this country now report that they know someone who is unemployed. Sharon: But a normal, moderate level of unemployment is 5 percent, with 1 out of 20 workers unemployed. So at any given time if a person knows approximately 50 workers, 1 or more will very likely be unemployed. Sharon's argument is structured to lead to which of the following as a conclusion? answer:A (A) The fact that 90% of the people know someone who is unemployed is not an indication that unemployment is abnormally high. (B) The current level of unemployment is not moderate. (C) If at least 5% of workers are unemployed, the result of questioning a representative group of people cannot be the percentage Roland cites. (D) It is unlikely that the people whose statements Roland cites are giving accurate reports. (E) If an unemployment figure is given as a certain percent, the actual percentage of those without jobs is even higher.
58. (34705-!-item-!-188;#058&007581)15s Roland: The alarming fact is that 90 percent of the people in this country now report that they know someone who is unemployed. Sharon: But a normal, moderate level of unemployment is 5 percent, with 1 out of 20 workers unemployed. So at any given time if a person knows approximately 50 workers, 1 or more will very likely be unemployed. Sharon's argument relies on the assumption that answer:B
(A) normal levels of unemployment are rarely exceeded (B) unemployment is not normally concentrated in geographically isolated segments of the population (C) the number of people who each know someone who is unemployed is always higher than 90% of the population (D) Roland is not consciously distorting the statistics he presents (E) knowledge that a personal acquaintance is unemployed generates more fear of losing one's job than does knowledge of unemployment statistics
59. (34753-!-item-!-188;#058&007583)27s A certain mayor has proposed a fee of five dollars per day on private vehicles entering the city, claiming that the fee will alleviate the city's traffic congestion. The mayor reasons that, since the fee will exceed the cost of round-trip bus fare from many nearby points, many people will switch from using their cars to using the bus. Which of the following statements, if true, provides the best evidence that the mayor's reasoning is flawed? answer:B (A) Projected increases in the price of gasoline will increase the cost of taking a private vehicle into the city. (B) The cost of parking fees already makes it considerably more expensive for most people to take a private vehicle into the city than to take a bus. (C) Most of the people currently riding the bus do not own private vehicles. (D) Many commuters opposing the mayor's plan have indicated that they would rather endure traffic congestion than pay a five-dollar-per day fee. (E) During the average workday, private vehicles owned and operated by people living within the city account for twenty percent of the city's traffic congestion.
60. (34801-!-item-!-188;#058&007584)31s Because no employee wants to be associated with bad news in the eyes of a superior, information about serious problems at lower levels is progressively softened and distorted as it goes up each step in the management hierarchy. The chief executive is, therefore, less well informed about problems at lower levels than are his or her subordinates at those levels. The conclusion drawn above is based on the assumption that
Answer:D (A) problems should be solved at the level in the management hierarchy at which they occur (B) employees should be rewarded for accurately reporting problems to their superiors (C) problem-solving ability is more important at higher levels than it is at lower levels of the management hierarchy (D) chief executives obtain information about problems at lower levels from no source other than their subordinates (E) some employees are more concerned about truth than about the way they are perceived by their superiors
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