若3xmbn和-2x3b2是同类项,则m=______,n=______.
∵3xmbn和-2x3b2是同类项,
∴m=3,n=2.
故答案为:3、2.
I was so excited that I ________ for the whole night.
A.held awake
B.stayed awake
C.held wake
D.stayed wake
汛期高水位时,在()附近或堤脚以外附近坑塘、洼地、稻田等处可能出现翻沙鼓水现象。
A.临河堤坡
B.临河堤脚
C.背河堤肩
D.背河堤脚