A.正負(fù)5度 B.正負(fù)1度 C.正負(fù)10度 D.正負(fù)3度
A.172.27.245.(30+槽位+1) B.172.27.245.(90+槽位+1) C.172.27.245.(50+槽位+1) D.172.27.245.(70+槽位+1)
A.2 B.6 C.4 D.8