单项选择题
A.66.97% B.105.03% C.93.14% D.92.78%
A.17.6% B.85% C.115% D.117.6%
A.随总体范围增大而增大 B.随总体范围增大而缩小 C.随总体范围缩小而增大 D.与总体范围大小无关
微信扫一扫,加关注免费搜题