I don’t think 1 will win a lottery( * * )of 5 000 000 dollars in a11 my life．

一Well       ．Everything can happen．

A．you can never tell

B．you’re kidding

C．what you say

D．you made it

一列简谐横波沿直线由A向B传播，A、B相距0.45m，下图是A处质点的振动图象．当A处质点运动到波峰位置时，B处质点刚好到达平衡位置且向y轴正方向运动，这列波的波速可能是（　　）

A．4.5m/s

B．3.0m/s

C．1.5m/s

D．0.7m/s