下列四幅图中，按比例尺由大到小的排列顺序，正确的是
A．②④①③
B．②①④③
C．②③①④
D．③①④②
答案：D
一组数据中若最小数与平均数相等，那么这组数据的方差为______．
I think I'll just________myself with a cup of tea before I go to meet the leader.[ ]
A．refresh
B．drown
C．astonish
D．bend
