默认情况下,一个C 类地址中包含 ( ) 可用主机地址。
A.126
B.128
C.254
D.256
参考答案:C
7 We _____ in four weeks time so Mr. Smith took me shopping for dress.
A were to marry with B were to be married C would marry to D were about to be married
汗疱疹需与以下哪些疾病进行鉴别诊断()
A.水疱型手癣
B.寻常疣
C.剥脱性角质松解症
D.二期梅毒的掌跖红斑