如果2x2y3与x2yn+1是同类项,那么n的值是[ ]
A.1
B.2
C.3
D.4
答案:B
-Kitty,how was your weekend?
-I had a great time.I went skiing with my friends.
-Wow, .
A.Sounds really cool!
B.Cheers!
C.How interesting you are!
D.I’ll go there,too.
人格测验的结果表示方式是()
A.描述
B.量化单位
C.量化单位和描述
D.定性单位
E.以上都对