For those involved, the scandal has been a very________(pain)experience
时间：2020-06-18
人气：0
It will be interesting to see what’s going to happen at the next________(elect).
负责电子邮件传输的应用层协议是
超文本的含义是
路由器工作于（）.用于连接多个逻辑上分开的网络
IP协议提供的是服务类型是
局域网中的MAC层与OSI参考模型（）相对应。
No sooner ()had I reached home than Michael arrived with Jane in his car
PPP是面向（）的协议。
He is ______absorbed in his own thoughts that he seems unaware of what's going on in the room
