2除以25的商用小数表示是（    ），用分数表示是（    ），用百分数表示是（    ）。

The standard (IEEE 802)format for printing (72) in human-friendly form is six groups of two hexadecimal digits，separated by hyphens(-) or colons(:)，in transmission order, e.g.01-23-45-67-89-ab，01:23:45:67:89:ab．This form is also commonly used for EUI-64．

A．hard disk logical block address
B．IP address
C．mail address
D．MAC address