3个小朋友排在一起照合影像，交换位置有______种不同的排法．
3×2×1=6（种）；
答：交换位置有6种不同的排法．
故答案为：6．
He found his house broken into and many things stolen _______ his return from office.
A．with
B．in
C．at
D．on
柜员不得携带与业务无关的现金、卡折上柜台，在全程监控的情况下，可以为本人办理业务。
