在()情况下,司机不得离开操作室。
A、货物处于悬吊状态
B、操作手柄未复位
C、手刹未处于制动状
D、吊臂回位前
E、门锁未锁好
参考答案:A, B, C, D, E
A.Because they have some financial problems.
B.Because there will be much rain in May.
C.Because they won’t have free time in May.
D.Because they can’t have everything got ready by then.
NetWare的网络结构是()。
A.总线型
B.星型
C.树型
D.环型