第23题: [单项选择]Questions 19 to 21 are based on the conversation you have just heard. A. She gets a student’s discount. B. Bob doesn’t have very much money. C. She lost a bet and owes Bob money. D. Bob left his wallet at home. 参考答案:B 答案解析:[听力原文] Why is Ellen buying the tickets
第30题: [单项选择]以下关于接入层网络技术类型的描述中,错误的是()。 A. 接入层网络技术类型可以分为两类:无线接入与有线接入 B. 无线接入主要有:802.15.4、6LowPAN、蓝牙、ZigBee与无线移动通信网的M2M C. 有线接入主要有:现场总线网接入、电力线接入、电视电缆与电话线接入 D. 符合IEEE802.3标准的Ethernet局域网既可以提供有线接入,也可以提供无线接入 参考答案:D