GMAT考试-GWD-CR解析-MAIN CONCLUSION

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GWD-1-Q14:C
That the application of new technology can increase the productivity of existing coal mines is demonstrated by the case of Tribnia’s coal industry.  Coal output per miner in Tribnia is double what it was five years ago, even though no new mines have opened.

Which of the following can be properly concluded from the statement about coal output per miner in the passage?

A.        If the number of miners working in Tribnian coal mines has remained constant in the past five years, Tribnia’s total coal production has doubled in that period of time.两倍的每矿产量*矿的数目*不变的人数=总量翻倍
B.        Any individual Tribnian coal mine that achieved an increase in overall output in the past five years has also experienced an increase in output per miner. 平均数和个别
C.        If any new coal mines had opened in Tribnia in the past five years, then the increase in output per miner would have been even greater than it actually was. 总数会增加但平均数不一定增加。红色部分改成总生产就对了
D.        If any individual Tribnian coal mine has not increased its output per miner in the past five years, then that mine’s overall output has declined or remained constant.和文章无关,不是从文章推出的
E.        In Tribnia the cost of producing a given quantity of coal has declined over the past five years.无关[A]
新科技----现存煤矿的生产力提高（普遍总体的概念，有别于个别平均的概念）
即使没有新的煤矿开发，T煤矿平均产量也翻倍

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GWD-2-Q17:
The quality of unrefined未提炼的 olive oil is not actually defined in terms of acidity, yet extensive tests have shown that the less free oleic acid an unrefined olive oil contains per liter, the higher its quality.  The proportion of free oleic acid that an olive oil contains is an（不是the，所以不是only）accurate measure of the oil’s acidity.
未提炼的橄榄油的质量与酸度无关。
油酸越少橄榄油质量越高
油酸是有的酸度的准确衡量。
If the statements above are all true, which of the following conclusions is best supported by them?

A.        When an olive oil is refined, the concentration of oleic acid in the oil is reduced.（指的是原油里含的油酸越少，质量越高，与提炼油的油酸含量无关）
B.        The quality of an unrefined olive oil can be determined only by accurately measuring its acidity.
C.        If an unrefined olive oil（A） is intermediate in acidity between two other unrefined olive oils（X，Y）, it will also be intermediate between them in quality. 酸度：X《 A〈 Y----油酸：X《 A〈 Y----质量：X《 A〈 Y，相当于线性函数〉
D.        Free oleic acid is the only acid that unrefined olive oil contains.
E.        People who judge the quality of unrefined olive oils actually judge those oils by their acidity, which the judges can taste.

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GWD-3-Q31:
Although most smoking-related illnesses are caused by inhaling the tar in tobacco smoke, it is addiction to nicotine that prevents most smokers from quitting.  In an effort to decrease the incidence of smoking-related illnesses, lawmakers in Sandonia plan to reduce the average quantity of nicotine per cigarette by half over the next five years.  Unfortunately, smokers who are already addicted to nicotine tend to react to such reductions by smoking correspondingly more cigarettes.（单只含尼古丁量减少——>吸烟数提高——>总吸烟量不变）

The information above most strongly supports which of the following predictions about the effects of implementing the Sandonian government’s plan?

A.        The average quantity of tar inhaled by Sandonian smokers who are currently addicted to nicotine will probably not decrease during the next five years.
B.        Sandonian smokers who are not already addicted to nicotine will probably also begin to smoke more cigarettes during the next five years than they had previously.
C.        The annual number of Sandonian smokers developing smoking-related illnesses will probably decrease during the next five years.
D.        The proportion of Sandonians attempting to quit smoking who succeed in that attempt will probably decrease during the next five years.
E.        The number of Sandonians who quit smoking during the next five years will probably exceed the number who quit during the last five years.[A]
对尼古丁上瘾导致人们不能戒烟。A说上了瘾了尼古丁摄入总量不会改变，那么每根烟的尼古丁含量少了，只能吸更多的烟。（数学等式：平均*数量=总量）

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GWD-8-Q40:
From 1973 to 1976, total United States consumption of cigarettes increased 3.4 percent, and total sales of chewing tobacco rose 18.0 percent. During the same period, total United States population increased 5.0 percent.

If the statements above are true, which of the following conclusions can be properly drawn?

A. United States manufacturers of tobacco products had higher profits in 1976 than in 1973.
B. Per capita consumption of cigarettes in the United States was lower in 1976 than in 1973. （人口增长是5%，consumption of cigarettes 增长才3.4%。当然人均consumption of cigarettes 变小了）
C. The proportion of nonsmokers in the United States population dropped slightly between 1973 and 1976.
D. United States manufacturers of tobacco products realize a lower profit on cigarettes than on chewing tobacco.
E. A large percentage of United States smokers switched from cigarettes to chewing tobacco between 1973 and 1976.（这一点从文中推论不出来。）

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GWD-9-Q13:
Fact: Asthma, a bronchial condition, is much less common ailment than hay fever, an allergic inflammation of the nasal passages.

Fact: over 95 percent of people who have asthma also suffer from hay fever.
画圈圈！
If the information given as facts above is true, which of the following must also be true? 归纳

A.        Hay fever is a prerequisite for the development of asthma
B.        Asthma is a prerequisite for the development of hay fever
C.        Those who have neither hay fever nor asthma comprise less than 5 percent of the total population
D.        The number of people who have both of these ailments is greater than the number of people who have only one of them
E.        The percentage of people suffering from hay fever who also have asthma is lower than 95 percent.