【单选题】信令网中的信令链有4.8kb/s的模拟信令链和( )的数字信令链两种。
【简答题】阅读理解. My sister,Mary,usually starts the day with breakfast. She often has a piece of cake and a glass of milk for breakfast, then she usually goes to work on foot. After work, she often goes to the mu...
【简答题】草图绘制圆弧的方法有通过()和圆心、端点建立圆弧。
【单选题】She usually ______ milk and bread for breakfast, but Jim _______ some coffee for it.
【单选题】信令网中的信令链有4.8kb/s的模拟信令链和()的数字信令链两种。
【单选题】NSA()技术标准的传输速率为4.8kb/s。
【单选题】She usually ________ milk and bread for breakfast, but Jim _____ some coffee for it .