单项选择题
A.100.1.32.7 B.192.178.32.2 C.172.17.32.15 D.172.35.32.244
A.154.100.80.128 B.154.100.80.190 C.154.100.80.192 D.154.100.80.254
A.C0 B.C1 C.C2 D.C3