问题 单项选择题

下列哪一种声音格式对声音进行了采样

A.CD音频

B.MIDI音频

C.波形音频

D.以上全部

答案

参考答案:C

解析:波形音频是多媒体计算机获取声音最简单、最直接的方式。声音卡以一定的采样频率和量化级对输入声音进行数字化采样,将其从模拟信号转换为数字信号 (A/D转换),然后以适当的格式存在硬盘上。

阅读理解

阅读短文,根据短文内容完成句子,每空填一词。

DearMissLi,

     I'd like to thank you for sending money to "Animal Helpers", an organization set up to help disabled people.

For sure you have helped make it possible for me to have "Lucky", who has filed my life with pleasure.

     "Lucky" is a specialy trained dog for the disabled. It is a good name for him because If eel very lucky to

havehim. Being blind, deaf, unable to use my hands easily are the chalenges I face. "Lucky" helps me open

and shut the doors, carry things and even answer the telephone. He cheers me up a lot.

     I'll send you a photo of him if you like, and Icould show you how he helps me too one day. And I thank

you again for supporting "Animal Helpers". It is important that this organization does not run out of money.

Your donation is greatly appreciated and the money is well used to help disabled people like me. 

     Bestwishes, 

                                                                                                                                            Liz Smith

1. Liz Smith is a __________ man who is __________ to see or hear.

2. "Lucky" is the __________ of a specialy __________ dog.

3. "Animal Helpers" is an organization that was __________ up to __________ the disabled.

4. Liz Smith will __________ Miss Lia photo of the dog and __________ her how "Lucky" helps him.

5. Liz Smith wrote this letter to __________ Miss Lif or her __________ to Animal Helpers.

计算题