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问题 单项选择题

ACCⅡ的新版称为ACCⅡ—8码，是一种8位码，可以为( )个字符编码。

A．128
B．192
C．224
D．256

答案

参考答案：D

解析：ACCⅡ的新版称为ACCⅡ—8码，是一种8位码，可以为256个字符编码。

选择题

Keys _______ opening the lock in the door.

A．used for

B．are used

C．are used to

D．are used for
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单项选择题

An architectural style defines as a family of such systems in terms of a （1）of structural organization. More specifically, an architectural style defines a vocabulary of（2） and connector types, and a set of （3） on how they can be combined. For many styles there may also exist one or more （4） that specify how to determine a system’s overall properties from the properties of its parts. Many of architectural styles have been developed over the years.

The best-known examples of （5） architectures are programs written in the Unix shell.

（4）是（）

A. semantic models

B. weak entities

C. data schemas

D. business models
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