SDH光口信号码型是不加扰的NRZ码,采用世界统一的标准扰码。

题型:判断题

问题:

SDH光口信号码型是不加扰的NRZ码,采用世界统一的标准扰码。

考点:通信工程师全业务网络技术全业务网络技术题库
题型:判断题

阅读下面的短文,然后根据短文内容回答问题。

   Once upon a time there lived a poor farmer called Smith. He didn't like to share things with others. Smith had

a friend who was famous for the wonderful apples he grew.

    One day, his friend gave Smith a young apple tree and told him to take it home and planted. The farmer was

pleased with the gift, but when he got home, he did not know where to plant.

   He thought and thought. Finally at night he planted the tree in his wood where no one could see it. But without

sunlight and good soil, the tree soon died.

   Later the friend asked the farmer why he had planted the tree in such a poor place.

   "What's the difference?" the farmer said angrily."If I had planted it near the road, strangers would have stolen

the fruit. If I had planted it in one of my fields, my neighbors would have come at night and stolen some of the

apples. If I had planted it near my house, my own children would have taken the fruit,"

   "Yes," said the friend,"but at least someone could have enjoyed the fruit. Now you not only have got nothing,

but also you have destroyed a good apple tree."

1. Was Smith happy about the gift? 

     ___________________________

2. When did he plant the apple tree?

     ___________________________

3. Where did Smith plant the apple tree in the end? 

     ___________________________

4.  Why did the apple tree soon die? 

      ___________________________

5.  What would probably happen if the farmer had planted the tree near his house? 

      ___________________________

题型:判断题

我能用“<”、“>”或“=”比较下面各题的大小.

60秒______60分9分米______90厘米4000克______4吨

50秒______5分2×0×9______2+0+9600毫米______60米.

题型:判断题

哲学上的两大基本派别是

A.辩证法和形而上学

B.可知论和不可知论

C.唯物主义和唯心主义

D.绝对主义和相对主义

题型:判断题

* * 球部损伤,血及尿可外渗到()

A.会阴部

B.阴茎

C.阴囊

D.下腹部

E.两侧股部

题型:判断题

栀子"利五淋,解五种黄疸,明目"的药理学基础是()

A.镇痛

B.降压

C.降温

D.解热

E.利胆

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