This arrangement rewards students who gravitate to courses where high marks are generously given and punishes those who seek out math and science courses,where far fewer students get the top grade.

• 这样的安排使那些选修易得高分课程的学生受益，而惩罚了那些选择数学和理科课程的学生，因为这些课程中只有很少的学生能得到最高分。