问题
单项选择题
下列关于组建一个多集线器10Mbps以太网的配置规则的描述中，错误的是( )。
A．可以使用3类非屏蔽双绞线
B．每一段非屏蔽双绞线长度不能超过100m
C．多个集线器之间可以堆叠
D．网络中可以出现环路时
答案
参考答案：D
解析： 多集线器10Mbps以太网组建的网络中不可以出现环路。
搜题请搜索小程序“爱下问搜题”
下列关于组建一个多集线器10Mbps以太网的配置规则的描述中，错误的是( )。
A．可以使用3类非屏蔽双绞线
B．每一段非屏蔽双绞线长度不能超过100m
C．多个集线器之间可以堆叠
D．网络中可以出现环路时
参考答案：D
解析： 多集线器10Mbps以太网组建的网络中不可以出现环路。
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| I used to live selfishly, I should admit. But one moment changed me. I was on my lunch break and had 1 the office to get something to eat. On the way, I 2 a Busker (街头 艺人), with a hat in front of him. I had some 3 in my pocket, but I would not give them to him, thinking to myself he would 4 use the money to feed his addiction to drugs or alcohol. He 5 like that type-young and ragged. 6 what was I going to spend the money on? Only to feed my addiction to Coca-Cola or chocolate! I then 7 I had no right to place myself above 8 just because he was busking. I 9 and dropped all the coins into his 10 , and he smiled at me, I watched for a while. As 11 as it sounds, I expected something more to come from that moment-a feeling of 12 or satisfaction, for example. But nothing happened 13 , I walked off. "It proved to be a waste of 14 ," I thought. On my way home at the end of the 15 , I saw the busker again and he was 16 . I watched him pick up the hat and walk 17 a cafe counter. There he poured the 18 contents into a tin collecting 19 an earthquake fund- raising (募捐) event. He was busking for charity (慈善)! Now I donate any 20 I have to charity tins and enjoy the feeling of giving. | ||||
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