是在Diagnostic Test里的逻辑题,
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 Cheeer College?
A, Among students who did not withdraw, students enrolled in online courses got higher grades, on average, than students enrolled in classroom-based 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.
我的理解是: 这学校有两种课程,在线和教室的. 对于学生表现的调查,在线学生的成绩和教室里学生的成绩是差不多的. 在计算成绩的时候,课程的取消和课程的失败同样处理(这句话我不是很理解,是什么意思??),教室里学生取消的比率要比在线学生取消的比率低.
为什么后来课程取消的比率和学生成绩又有关系呢? 有没有可能教室里的学生和在线的学生水平都差不多所以计算出来的成绩比较接近.
这题我完全没有思路...混乱 希望N人解释一下~ 谢谢!
答案是A作者: Sunfisher006 时间: 2012-6-4 19:29
