单项选择题
A.122.168.3.30B.121.168.34.32C.120.15.4.33D.192.168.5.34
A.192.168.3.30B.192.168.3.32C.192.168.4.33D.192.168.5.34
A.192.168.2.1B.192.168.3.1C.192.168.4.1D.192.168.5.1