虚拟网络是建立在局域网交换机或ATM交换机之上的,它以( )方式来实现逻辑工作的划分管理。
参考答案:软件
__________, they couldn’t make her change her mind.
A.Hard as they tried
B.Tried hard as they
C.As they tried hard
D.They tried as hard
A bond is needed when the bill of lading cannot be availed of the time of entry of the im- ported commodities. What does the sentence mean.()
A. A bond is needed when the bill of lading is unavailable when the goods arrive at the destination.
B. A bond is needed when the bill of lading arrives at the port of destination.
C. A bond is not needed when the goods arrive at the destination.
D. A bond is needed when the goods arrive at the destination if there is no bill of lading at all.