Ann's date of ______ is May,9th.[ ]
A. birth
B. birthday
C. born
D. age
答案:A
下面属于C类IP地址的是______。
A.191.168.0.1
B.10.98.0.78
C.203.127.211.11
D.126.255.129.90
[案情]
[问题]