【单选题】what time would you be home?
【简答题】What time would you like to be up?
【简答题】用户关注的通信网络主要是()传输的()性和()性问题。
【单选题】What time would you like your table?
【单选题】鉴别香豆素首选的化学显色反应是( )
C.
Borntrager反应 prefix = o ns = "urn:schemas-microsoft-com:office:office" /?
【单选题】—I’m afraid I can’t get up early. You know, winter is coming. Besides, I hate getting up early. —If I were you, I’d start from something easy, such as doing some sports once a week at first. —It sound...
B.
What time would you like to get up
C.
Could you change my mind
D.
What would you do in my situation
【单选题】--- What time would you like me to this evening for the concert? --- I think 6:30 will be OK.
【多选题】下列关于SDH和WDM的说法正确的是( )。
A.
SDH 和 WDM 技术是目前传送网使用的主要技术。
B.
SDH 技术偏重于业务的电层处理,以 VC 为基本颗粒交叉调度、同步和单通道线路为基本特征。
C.
WDM 技术则专注于业务的光层处理,以多通道复用 / 解复用和长距离传输为基本特征。
D.
以 VC 调度为基础的 SDH 网络在扩展性方面呈现出了明显不足,无法满足业务的快速增长;而 WDM 技术采用客户信号直接映射进光通道的方式,使其只能定位于点对点的应用。