管理和运营宽带城域网的关键技术主要是:带宽管理、( )、网络管理、用户管理、多业务接入、统计与计费、( )、网络安全等。
参考答案:服务质量QoS IP地址的分配与地址转换
小题1:The new airport is built close to the freeway, and it is __ by Bus No. 2.(可以到达的)
小题2:We must all be aware of the ____ causes of traffic accidents and act to prevent them (潜在的)
小题3:We cannot ___ the punctual arrival of trains in foggy weather.(保证)
小题4:People who don’t get their sufficient sleep are actually sending an __ to severe problems in their life.(诱因,邀请)
小题5:Jim went to answer the phone; __, Harry started to prepare lunch.(与此同时)
小题6:Both aspirin and penicillin have saved millions of people’s lives and proved ___ ___ mankind since they were invented.(对……有益)
小题7:The number of road accidents and the deaths ___ ___ those accidents has increased greatly over the past year.(由……引起)
小题8:One of the greatest benefits of Internet friendships is that they are based on common interests, ___ __ appearance or age.(而不是)
遵守党的纪律,首要的是严格遵守党的()纪律。
A.政治
B.组织
C.人事