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CR67-77題

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

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越來越流行

玩電腦預示著看電視的人少了。美國一個最近的研究發(fā)現(xiàn)，有電腦的人平均看電視的時間比那些沒有電腦的人看電視的時間要少。但是，這個發(fā)現(xiàn)不能證明用電腦就減少了看電視的時間，因為_____ 選項分析題干中的一個推理過程是：因為有電腦的人看電視的時間少，就推出玩電腦讓人看電視的時間變少了。注意，這中間是有一個變化過程的，即：看電視的時間因為玩電腦而變少。那么如果玩電腦的人本來就不愛看電視呢？根本就沒有"變少"一說，因為本來就少，也就是說玩電腦和看電視沒關(guān)系。不玩電腦也不會去看電視。 A：很多不看電視的人沒有電腦。無關(guān)，排除。 B：雖然大多數(shù)有電腦的人比國家平均看電視的時間要少很多，一些有電腦的人看電視卻遠遠超過平均水平。"一些"是很模糊的概念，對結(jié)論基本沒有影響，類似"說了跟沒說"一樣的效果，排除。 C：玩電腦的人本來就是那種比平均水平看電視時間要少很多的一群人。沒錯，本來就看得少，何來"變少" 一說？ D：很多有電腦的人有足夠的休閑時間，就算玩電腦也能有許多時間看電視。"很多"模糊概念，說明不了問題，排除！ E：很多用電腦的人是為了完成在電腦上能快速做完的任務(wù)，這樣就能節(jié)約出更多時間看電視。"很多"，排除！