A.物理位置 B.在電源網(wǎng)絡 C.防雷網(wǎng)絡 D.底線網(wǎng)絡中
A.SHOw bOArd B.SHOw CArd C.SHOw SHeLF D.SHOw rACk
A.0 B.1 C.2 D.3