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问题 选择题

. There are    students in our schoo1.

A．three thousand

B．three thousand of

C．three thousands

D．three thousands of

答案

答案：A

单项选择题

在C类地址197.15.22.31和子网掩码255.255.255.224的情况下，借了多少位来创建子网（）

A.1

B.2

C.3

D.上述答案都不对
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单项选择题

When most people refer to multimedia, they generally mean the combination of two or more continuous media, usually with some user (115) . In practice, the two media are normally audio and video, this is, (116) plus moving (117) .
It should be’ obvious by now that transmitting multimedia material in uncompressed form is completely out of (118) . The only hope is that massive compression is possible. Fortunately, a large body of research over the past few decades has led to many compression techniques and algorithms that make multimedia transmission (119) .

A．display

B．games

C．help

D．interaction

E．pictures

F．sound

G．web
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