若单项式x2ym+2与-3xny的和仍然是一个单项式,则m=______,n=______.
由同类项的定义,
可知2=n,m+2=1,
解得m=-1,n=2.
故答案为:-1;2.
People were excited when they saw “Monkey King” 2014 the Yellow River Estuary (入海口,河口) International Marathon.
A.losing
B.running
C.refusing
D.forgetting
—When did you ?
—I've here for half a day. [ ]
A. arrive; arrived
B. reach; come
C. reach; reached
D. arrive; been