She doesn't like pop music,_____she? [ ]
A. doesn't
B. does
C. likes
答案：B
能够体现全貌的信息有（）
A.集中趋势
B.离散水平
C.相对趋势
D.平均值
油泵的轴向间隙磨损过大，会造成输油量增加。
