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问题 单项选择题 A1/A2型题

选择下列仪器功能中的一个功能来完成组织衰减的补偿（）

A.边缘增强作用

B.TGC功能

C.显示类型

D.发射器

E.转换器

答案

参考答案：B

解析：在较深组织的衰减补偿中最常用的就是时间增益补偿(TGC)。

单项选择题

By using MP3, a 600M-byte music CD can be (70) to 50M bytes or less. It can be streamed (downloaded in chunks)so that you can begin listening to the opening bars while the (71) of the file arrives in the background. And, most important, MP3 music files retain good listening (72) that (73) compression schemes lacked. That (74) of features makes accessing and distributing music on the Web practical for the first time.

A．add

B．combination

C．difference

D．condition
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