若2xm-1y与x3yn是同类项,则m,n满足的条件是[ ]
A.m=4,n=1
B.m=4,n=0
C.m=1,n=3
D.m=2,n=1
答案:A
We’ll be traveling by ________ camel across the desert before we go to ________university.
A./; the
B.the; /
C./; /
D.the; a
校园歌曲《童年》的词曲作者是蒋开儒。