老题新问，prep08-2的89题目

蟹黄味蚕豆

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 done more rapidly on the computer, and doing so leaves more leisure time for watching television

OA：C 正确答案是C是可以理解的，但是看到A的时候有一点迷惑，希望NN来指点。
个人的理解如下，请各位牛牛指点。
这道题的逻辑链是：
因为：一项最新的实验表明显示，跟没有电脑的人相比，有电脑的人看电视的平均时长更短
所以：用电脑，会导致看电视的时间减少
要削弱这个推理。
A选项，是无关呢？还是削弱呢？
无关：A选项说的是 很多不看电视的人，是没有电脑的。 这个是解释了实验数据里面的一部分？还是完全就不在实验数据的调查人群里面？
削弱：但是不看电视的人，是没有电脑的。 在跟用电脑，减少看电视时间的这个论证上，是无因有果，相当于切断了用电脑和看电视的因果联系，是否是削弱选项？
希望牛牛给解答一下

蟹黄味蚕豆

手动@kluivert  

kluivert

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 ...

研究发现有电脑比没电脑的看电视少.但这研究不能支持“使用电脑趋于减少看电视时间”，因为...

一看到“”however“ " since " 就立马明白是要争对这个研究的样本转折啊....

since后要跟合理解释 ：但这研究不能支持“使用电脑会减少看电视时间

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

c就是研究的样本-那些拥有电脑的人----本来就是属于不爱看电视的人...所以把他们拿来作为“使用电脑会减低看电视时间”就不成立了

A. many people who watch little or no television do not own a computer  很多少看，或不看电视的人没电脑

把这就话填进去，完全不和逻辑了

“研究发现有电脑比没电脑的看电视少.但这研究不能支持“使用电脑会减少看电视时间”，因为很多少看，或不看电视的人没电脑...”


牛头不对马嘴...人家说使用电脑会降低看电视时间， 这里却说 没电脑的人

蟹黄味蚕豆

kluivert 发表于 2018-10-5 13:57
Recent studies have found that, in the United States, people who own computers watch, on average, si ...

懂了 既然是填空题 直接填进去就好了