—Can you draw?
A:music club
B:basketball club
C:English club
D:art club
如图1是在水槽中看到的水波的____现象;图2是用激光束照射一个不透明的小圆盘时,在像屏上观察到的图样,这是光的____现象.
已知M={a,a+d,a+2d},N={a,aq,aq2},a≠0,M=N,求q的值.