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问题 单项选择题

下列表达式中，其运算结果为逻辑真工的表达式是______。

A．"ABC"＞"ASC"ANOR NOT 23＜＞60/2

B．NOT2**3＜＞8AND"PUT"$"COMP"+"UTER"

C．"BASIC"=="BAS"AND"XY"$"EFG"+"XY'，ORNOT

D．"Pro"$FoxPro"AND"红"$"江小红"ANF

答案

参考答案：B

单项选择题

For each blank, choose the best answer from the four choices and write down on the answer sheet.

In (1) the strength of the carrier signal is varied to represent binary 1 or 0. (2) is a system that can map a name to an address and conversely an address to an name. (3) is a three -way handshaking authentication protocol that it’s packets are encapsulated in the point - to -point protocol. (4) is an approach that enables an ATM Switch to behave like a LAN switch. (5) is an guided media which is made of glass or plastic and transmits signals in the form of light.

2（）

A．AAT

B．NCP

C．DNS

D．DDN
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单项选择题

在选择多媒体数据压缩算法时需要综合考虑______。

A．数据质量和存储要求
B．数据的用途和计算要求
C．数据质量、数据量和计算的复杂度
D．数据的质量和计算要求
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