标题: 逻辑的一个题目不是很明白，帮我看看哪里错了 [打印本页] 作者: 小皮球PAL 时间: 2012-11-26 20:31 标题: 逻辑的一个题目不是很明白，帮我看看哪里错了 31. Cheever College offers several online courses via remote computer connection, in addition to traditional classroom-based courses. A study of student performance at Cheever found that, overall, the average student grade for online courses matched that for classroom-based courses. In this calculation of the average grade, course withdrawals were weighted as equivalent to a course failure, and the rate of withdrawal was much lower for students enrolled in classroom-based courses than for students enrolled in online courses. If the statements above are true, which of the following must also be true of Cheever College? (A) Among students who did not withdraw, students enrolled in online courses got higher grades, on average, than students enrolled in classroombased courses. (B) The number of students enrolled per course at the start of the school term is much higher, on average, for the online courses than for the classroom-based courses. (C) There are no students who take both an online and a classroom-based course in the same school term. (D) Among Cheever College students with the best grades, a significant majority take online, rather than classroom-based, courses. (E) Courses offered online tend to deal with subject matter that is less challenging than that of classroom-based courses. 正选 A 我的理解 ONLINE COURSE 退出的人多，但是2者平均分确实一样的，所以ONLINE的高分多。这是题意 不知道如何成立？比如现实COURSE的高分很多，低分也很多，2者一平均从而使平均分到C ONLING上面人的分数浮动没有那么多，都是C。 按照我的理解题目也成立，是不是我看错了。或者是course WITHDRAWLS在这里是不及格的意思? 请教了作者: piaopiao633 时间: 2012-11-26 21:34
我觉得是不是这句话：In this calculation of the average grade, course withdrawals were weighted as equivalent to a course failure online course退出的人少，说明course failure的人也少--->平均分比classroom based courses的人高
open to discuss作者: 小皮球PAL 时间: 2012-11-29 16:17 标题: 谢谢~ 我重新看了一遍，应该是我把course failure理解错了，这里应该理解为不及格的意思吧，谢谢了