题型：名词解释 It was unbelievable that the fans waited outside the gym for three hours just ______ a look at the sports stars. [ ]A. had B. having C. to have D. have 查看答案
题型：名词解释 为了解决ATM与以太网的连接，可采取A．在ATM交换机内部单独定义以太网帧格式B．改变ATM交换机的传输速率，使之与以太网传输率一致C．将ATM的信元格式通过路由器转换为以太网数据帧格式D．在ATM交换机中增设以太网端口模块 查看答案