下列选项中，属于有效的地址的是( )。A．258.12.254.1 B．253.4
题型：单项选择题
问题：
下列选项中，属于有效的地址的是( )。
A．258.12.254.1
B．253.4.205.23
C．193.255.256.0
D．205.-93.45.139
题型：单项选择题
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