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求助!!新prep2-89

89.      


Which of the following most logically completes the argument?

The growing popularity of computer-based activities was widely predicted to result in a corresponding decline in television viewing.Recent studies have found that, in the United States, people who own computers watch, on average, significantly less television than people who do not own computers.In itself, however, this finding does very little to show that computer use tends to reduce television viewing time, since __
.


A. many people who watch little or no television do not own a computer

B. even though most computer owners in the United States watch significantly less television than the national average, some computer owners watch far more television than the national average

C. computer owners in the United States predominantly belong to demographic groups that have long been known to spend less time watching television than the population as a whole does

D. many computer owners in the United States have enough leisure time that spending significant amounts of time on the computer still leaves ample time for watching television


E. many people use their computers primarily for tasks such as correspondence that can be television

正确答案选C,但我对B和D都有点疑惑。。
我是这么理解的,请牛人们指点。。
题目:随着电脑的普及,看电视越来越少了。但调查显示,平均来看,有电脑的人比没电脑的人看电视更少了。但是,这并不能说明电脑的使用会减少看电视的时间,因为
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B 有些有电脑的人看电视的时间比国内平均看电视时间长,有的人看电视的时间比国内平均看电视时间短,我觉得这么选项很模糊,并不能说明调查结果是有效还是无效。
C说原文中的现象是地域性的,所以不能反映整体水平,这我可以理解。。
D很多拥有电脑的人,有很多的业余时间,他们在使用电脑花了很多时间后,仍有大量时间用来看电视。
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题目中,study说的是computer own, 得出的确实 computer use ,它本身就是有gap的.两者并不相同.
B,说一多一少,并且都是some,削弱能力很弱,同时,就算一多一少,平均还是少了.
C,demographic是指人口统计的,也就是说,computer own本身的看电视时间就少,不是use 造成的.很大程度削弱了原文结论.我做错的时候,也就是没有关注到这个却别,把两者等同了,也就在做题时候把这个C当成反选项排除了.
D,他有电脑,虽然两者花费的时间都很多,依旧是可以有你增我减的关系,只是两者增减后依旧各自时间很多.
E,我觉得是最后干扰的,貌似人们这么做是为了使看电视时间增多,但是,选项做的many很大程度削弱了这个选项的作用,many可多可少,10%也可以叫做many,而且,task是由such as引出的,个人觉得太过于特例了,总而排除.

至于A,我开始看了老半天没有看懂,后来明白了,这不是在扯蛋吗? 莫名其妙的,竟然还浪费了我这么多时间理解这个选项.

这题蛮说明,在削弱题中,尽量不要选many,some此类模糊词的选项.

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还有人帮忙解释一下这道题么?多谢

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恩 谢谢

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B. even though most computer owners in the United States watch significantly less television than the national average, some computer owners watch far more television than the national average
some作为样本是绝对错误的,因为是少数,不能以他们的行为反对电脑的使用会减少看电视的时间

D. many computer owners in the United States have enough leisure time that spending significant amounts of time on the computer still leaves ample time for watching television
这个选项完全没有用电脑和看电视时间的相互关系,2个花费的绝对时间都很多,但可能还是存在此消彼长的关系,电脑花的时间更多些,看电视的时间就会更少

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