阅读以下HFC宽带接入Internet的技术说明，根据要求回答问题1～6。
[说明]
某小区采用HFC接入Internet的解决方案进行网络设计，网络结构如图2-27所示。
[问题1]
请为图2-27拓扑结构中，(1)～(5)空缺处选择对应的设备名称。
备选设备为：CMTS、以太网交换机、光收发器、光电转换节点、Cable Modem。
参考答案：CMTS
| 完形填空。 | |||
| I like music so much. To me, life without music would be 1 I realize that this is not true 2 everybody. Many people get along quite well without going to concerts or listening to records. But music plays an important part in everyone's life, whether they 3 it or not.Try to 4 what movies or TV plays would be like without music.I am sure that movies without music may make people 5 bored, even they don't want to see them, Music gives movies 6 . It can make us excited or interested in them.Now, we have been speaking about music in its more common meaning-the kind of music we hear in the concert hall.In fact, we can 7 music in our everyday life, too- the singing of birds, the tick of the rolling trains, the sound of the sea waves and so on. So 8 must have meaning for everyone, in some way or other, and of course, it has a special meaning for those who have spent all their 9 playing or writing music.Music takes us into a beautiful 10 . It inspires (激励)us. | |||
| ( )1. A. boring ( )2. A. of ( )3. A. agree ( )4. A. answer ( )5. A. feel ( )6. A. colors ( )7. A. think ( )8. A. birds ( )9. A. hobbies ( )10.A. concert | B. interesting B. for B. see B. remember B. watch B. feelings B. remind B. trains B. times B. world | C. exciting C. at C. realize C. do C. look C. interests C. discover C. sea waves C. money C. subject | D. colorful D. on D. understand D. imagine D. find D. noise D. listen D. music D. lives D. place |