问题 单项选择题

FM信号一般用()解调。

A.包络检波器

B.鉴相器

C.鉴频器

D.同步检波器

答案

参考答案:C

阅读理解

阅读理解,回答问题。

Sam: Look, I've got an email from Lingling. It's about her dog.                  

Fanfan: What does it say?                                                      

Sam: Yesterday her Dad bought a little dog for her.                            

Fanfan: What's the dog's name?                                                  

Sam: His name's Doudou. He's one year old. He had a Chinese breakfast yesterday.

Fanfan: What did he have?                                                      

Sam: He had eggs and porridge(稀饭).                                          

Fanfan: What did Lingling do with her dog?                                      

Sam: She played football with her dog. Doudou can catch the ball well.          

Fanfan: Great!  Maybe one day I will go to see him.                            

1. Has Fanfan got an email from Lingling?                                      

    _____________________________________________________________________        

2. What did Lingling's Dad do yesterday?                                      

    _____________________________________________________________________        

3. How old is Lingling's dog?                                                  

    _____________________________________________________________________        

4. What did Doudou eat yesterday?                                              

    _____________________________________________________________________        

5. Can Doudou catch the football?                                              

    _____________________________________________________________________        

单项选择题