问题
填空题
宽带综合业务数字网(B-ISDN)的传输速率很高，能达到几十或几百Mb/s，甚至达到几十或几百Gb/s。当数据传输速率超过1Gb/s时，一般要采用______作为传输介质。
答案
参考答案：光纤或光缆
解析： 由于光纤通信具有损耗低、频带宽、数据率高、抗电磁波干扰力强等特点，适用于高速率、距离较大的网络。
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宽带综合业务数字网(B-ISDN)的传输速率很高，能达到几十或几百Mb/s，甚至达到几十或几百Gb/s。当数据传输速率超过1Gb/s时，一般要采用______作为传输介质。
参考答案：光纤或光缆
解析： 由于光纤通信具有损耗低、频带宽、数据率高、抗电磁波干扰力强等特点，适用于高速率、距离较大的网络。
用方框中所给单词的适当形式填空，使短文正确、通顺。每词限用一次。
 The London Eye is a tourist attraction in London, the UK. There you can get into a capsule(密封舱) to enjoy a great view of the city of London. I 小题1:____________ the London Eye last summer with a friend. My friend didn't know where we were going. I just told him we would go somewhere very special. As we arrived 小题2:__________ Waterloo Station, he had worked out where we were going. He 小题3:___________ happily. When we reached the London Eye, there was a very long waiting line, so in order to 小题4: time, he stayed in the line while I went to buy the 小题5:___________. The capsule doesn't completely stop when people get on, so you have to get into it 小题6: ____________. Then the door of the capsule shuts. The view was wonderful. We took many photos of the view and of小题7:___________ . It took about half an hour for the capsule to go around If you are 小题8:______________ in going there, I'd like to give you some advice. To enjoy the view, go in the 小题9:__________. There are night rides, but you won't see a lot. Sometimes the top of the wheel can be quite cool even 小题10:________ it's sunny. So ladies, don't forget to take a scarf. |