问题 单项选择题

IP电话系统有4个基本组件,它们分别是终端设备、网关、多点控制单元和( )。

A) 路由器
B) 交换机
C) 网守
D) 集线器

答案

参考答案:C

解析: IP电话系统有4个基本组件:终端设备、网关、多点控制单元和网守。

改错题

第二节:短文改错(共10小题;每小题1.5分,满分15分)

此题要求改正所给短文中的错误,对标有题号的每一行做出判断:如无错误,在该行右边横线上画一个钩(√);如有错误(每行只有—个错误),则按下列情况改正:

此行多一个词:把多余的侧用斜线(\)划掉,在该行右边横线上写出该词,并也用斜线划掉。

此行缺一个词:在缺词处加一个漏字符号(^),在该行右边横线上写出该加的词。

此行错一个词:在错的词下划一横线,在该行右边横线上写出改正后的词。

注意:原行没有错的不要改。

When train fairs went up for the third times in one year, I decided          76______

buy a motorcycle to ride to work. My idea was that. although I            77______

would have to pay for tax, insurance and gasoline, I will still spend        78______

more than on train tickets over the year. I might even save time on         79______

the journey from home to work. So I bought for one small                80______

second-hand Japanese motorcycle. I began to learn to ride them. At first     81______

it seemed very difficult for me when l had never learned to ride           82______

a ordinary bicycle before. But I soon got used to it. I just fell             83______

off once or twice during the first few weeks, but after a while            84______

I felt reasonable confident and rode to work every day.                 85______

多项选择题