标题: 问几题逻辑~ [打印本页] 作者: 茶色的秋天 时间: 2011-12-2 15:47 标题: 问几题逻辑~ Photovoltaic power plants produce electricity from sunlight. As a result of astonishing recent technological advances, the cost of producing electric power at photovoltaic power plants, allowing for both construction and operating costs, is one-tenth of what it was 20 years ago, whereas the corresponding cost for traditional plants, which burn fossil fuels, has increased. Thus, photovoltaic power plants offer a less expensive approach to meeting demand for electricity than do traditional power plants. The conclusion of the argument is properly drawn if which one of the following is assumed? A. The cost of producing electric power at traditional plants has increased over the past 20 years. B. Twenty years ago, traditional power plants were producing 10 times more electric power than were photovoltaic plants. C. None of the recent technological advances in producing electric power at photovoltaic plants can be applied to producing power at traditional plants. D. Twenty years ago, the cost of producing electric power at photovoltaic plants was less than 20 times the cost of producing power at traditional plants. E. The cost of producing electric power at photovoltaic plants is expected to decrease further, while the cost of producing power at traditional plants is not expected to decrease.
14. Pamela: Physicians training for a medical specialty serve as resident staff physicians in hospitals. They work such long hours—up to 36 consecutive hours—that fatigue impairs their ability to make the best medical decisions during the final portion of their shifts. Quincy: Thousands of physicians now practicing have been trained according to the same regimen, and records show they generally made good medical decisions during their training periods. Why should what has worked in the past be changed now? Which one of the following, if true, is the most effective counter Pamela might make to Quincy’s argument? A. The basic responsibilities of resident staff physicians in hospitals have not changed substantially over the past few decades. B. Because medical reimbursement policies now pay for less recuperation time in hospitals, patients in hospitals are, on the average, more seriously ill during their stay than in the past. C. It is important that emergency-room patients receive continuity of physician care, insofar as possible, over the critical period after admission, generally 24 hours. D. The load of work on resident physicians-in-training varies according to the medical specialty for which each is being trained. E. The training of physicians should include observation and recognition of the signs indicating a hospitalized patient’s progress or decline over a period of at least 36 hours. D。
By analyzing the garbage of a large number of average-sized households, a group of modern urban anthropologists has found that a household discards less food the more standardized-made up of canned and prepackaged food—its diet is. The more standardized a household’s diet is, however, the greater the quantities of fresh produce the household throws away. Which of the following can be properly inferred from the passage? A. An increasing number of households rely on a highly standardized diet. B. The less standardized a household’s diet is, the more nonfood waste the household discards. C. The less standardized a household’s diet is, the smaller is the proportion of fresh produce in the household’s food waster. D. The less standardized a household’s diet is, the more canned and prepackaged foods the household discards as waste. E. The more fresh produce a household buys, the more fresh produce it throws away.
14. Pamela: Physicians training for a medical specialty serve as resident staff physicians in hospitals. They work such long hours—up to 36 consecutive hours—that fatigue impairs their ability to make the best medical decisions during the final portion of their shifts. Quincy: Thousands of physicians now practicing have been trained according to the same regimen, and records show they generally made good medical decisions during their training periods. Why should what has worked in the past be changed now? Which one of the following, if true, is the most effective counter Pamela might make to Quincy’s argument? A. The basic responsibilities of resident staff physicians in hospitals have not changed substantially over the past few decades. B. Because medical reimbursement policies now pay for less recuperation time in hospitals, patients in hospitals are, on the average, more seriously ill during their stay than in the past. C. It is important that emergency-room patients receive continuity of physician care, insofar as possible, over the critical period after admission, generally 24 hours. D. The load of work on resident physicians-in-training varies according to the medical specialty for which each is being trained. E. The training of physicians should include observation and recognition of the signs indicating a hospitalized patient’s progress or decline over a period of at least 36 hours. D。
By analyzing the garbage of a large number of average-sized households, a group of modern urban anthropologists has found that a household discards less food the more standardized-made up of canned and prepackaged food—its diet is. The more standardized a household’s diet is, however, the greater the quantities of fresh produce the household throws away. Which of the following can be properly inferred from the passage? A. An increasing number of households rely on a highly standardized diet. B. The less standardized a household’s diet is, the more nonfood waste the household discards. C. The less standardized a household’s diet is, the smaller is the proportion of fresh produce in the household’s food waster. D. The less standardized a household’s diet is, the more canned and prepackaged foods the household discards as waste. E. The more fresh produce a household buys, the more fresh produce it throws away.作者: cheesecake959 时间: 2011-12-2 17:34
不给答案的呀。。。作者: iaboutyou 时间: 2011-12-2 17:53
P是以前的十分之一 T在增长 就得出P less expensive than T 是不充分的 如果P 20年前cost比T多10倍以上，即使新的P'=P/10 P‘也不一定<T’ D选项就排除了这种可能 20年前P就less than 20 times T 那么P'=P/10 ’一定<T' 不知道你看的懂不作者: cloudballoon 时间: 2011-12-2 19:20
B是说生产的电力比较 跟成本无关 答D作者: cloudballoon 时间: 2011-12-2 19:37
E. The more fresh produce a household buys, the more fresh produce it throws away.作者: zhainiuniu 时间: 2011-12-2 19:55
总觉得不对啊，第一题D选项应该是10times才行啊，20还是说明不了问题的，求解释作者: 维京少年 时间: 2011-12-3 00:23
’一定<T'