But the average homework time for a ten year old, for example,is little more than 30 minutes per night. And then, the speaker draw his or her conclusion that barabara.....The author bases his conclusion on an average score, so we can see the assumption that(choice D): in most schools, the homework assignments given are of a length that does not diverge widely from the average. this choice justify the use of average score is correct.
i choose D, this is necessary assumption, if not, some students' homework time diverge widely from the average, maybe will result in occupy all his free time, even the ratio of this kind of students is only 1%, it will come out a lof students do not have enough free time.
一点个人观点,我认为无论是加强还是削弱都应该关注文章的结论,本题所该关注的应该是在the average homework time for a ten year old is little more than 30 minutes per nigh 的前提下是否依然需要impose the limits, 而不是在讨论impose the limits的做法本身是否是有必要的.所以D是正确的,而不是A.
京公网安备11010202008513号 京ICP证101109号 京ICP备12012021号
发表于 2006-12-11 21:37:00
