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问题 问答题 简答题

多路复用一般可以分为哪几种基本形式（要求只写出名称）？多路复用的实质是什么？

答案

参考答案：多路复用分为：频分复用、时分复用、波分复用和码分复用。多路复用的目的是让不同的计算机连接到相同的信道上，共享信道资源。

改错题

短文改错

假定英语课上老师要求同桌之间交换修改作文，请你修改你同桌写的以下作文。文中共有10处语言错误，每句最多有两处，每处错误仅涉及一个单词的增加、删除或修改。

增加：在缺词处加一个漏字符号（∧），并在其下面写出该加的词。

删除：把多余的词用斜线（\） 划掉。

修改：在错的词下划一横线，并在该词下面写出修改后的词。

注意：1.每处错误及其修改均仅限一词;

2. 只允许修改10处，多者（从第11处起）不计分。

Today I showed some foreign friend around our city. We started off in car from the Friendship Hotel at 8:00 a.m. We first got to Jiangnan Park. We are all struck by its beautiful flowers on show. Then, we visited the City Museum. We saw plenty of valuable things, from that we learned a lot about the city. After that, they drove to Bei Shan Park. That is a beautiful place of interest in our city, but there we enjoyed the wonderfully scenery of the lake. We had delicious lunch at the seafood restaurant and we returned back at noon. All the foreign friends were pleased with my arrangement. We did have the wonderful time today.
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单项选择题

女性输尿管（）

A、通过尿生殖膈

B、分腹段、盆段

C、至上而下粗细均匀

D、行经子宫颈外侧2厘米处与子宫动脉交叉

E、无上述情况
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