There was no one to meet him at the airport______he had told no one when he was returning.
A. as long as
B. since
C. whether
D. unless
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以下协议中支持可变长子网掩码和路由汇聚功能的是——。
A. VTP
B. OSPF
C. RIPvl
D. IGRP
I hope they______this road by the time we come back next summer.
A. will finish repairing
B. would finish repairing
C. will have finished repairing
D. have finished repairing
______you are happy, it doesn't matter what you do.
As
B. As long as
C. Unless
D. In case
在CSM网络管理界面下，下拉[Port]菜单，单击[Port Setting]，就可以配置——。
A. 交换机端口速率
B. 交换机系统时间
C. 交换机的用户口令
D. 交换机速率
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