搜题请搜索小程序“爱下问搜题”
问题 填空题

光纤接入网指的是使用（）作为主要传输介质的因特网接入系统，在该传输介质中传输的是光信号。

答案

参考答案：光纤

解析：

光纤接入网是一种以光纤作主要传输媒介的接入网。按照光纤到达的位置，有光纤到路边(FTTC)，光纤到大楼(FTTB)，光纤到办公室(FTTO)，光纤到家(FTTH)之分。

听力题

I had a very unusual experience on小题1:星期天。At around ten   o’clock in the morning, I was walking down the street when a UFO landed in 小题2:f_____ of me. You can imagine how小题3:奇怪的it was! An alien got out and walked down the Center Street. I 小题4:跟随it to see where it was going, and I was very surprised when it went into a souvenir shop. While it was looking at the souvenirs, the assistant called the 小题5:p_______.
查看答案
判断题

石灰的烧结过程伴随着石灰进一步密实和化学活性的升高。
查看答案