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问题 单项选择题

信息系统实现访问控制有多种方式，其中以用户为中心建立起的描述访问权限的表格，这种方式指的是（）

A.访问控制矩阵

B.访问控制表

C.访问控制能力表

D.授权关系表

答案

参考答案：C

填空题

根据短文内容及首字母提示，补全空格内单词，使短文完整、通顺。

     School education (教育) is very important and useful. Yet no one can l  1    everything at school and

a teacher can't teach his students e  2     they want to know. His job is to s  3     his students how to learn. He teaches them how to read and how to think. So the students can learn much more by t  4    .

     It is more i  5     to know how to study by oneself. It's quite easy to learn something, but it's difficult

to u  6     it to solve problems. Great inventors do not get everything from school, but they still can invent

many things and change the world a l  7    . 

     How can the inventors do all of this? That's b  8     they know how to study. A lot of things are not

taught in the classroom. They get a lot of knowledge by reading o  9     school. They work hard and never

g  10    up all their lives.
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填空题

虚拟网络是建立在局域网交换机或ATM交换机之上的，它以 【7】 方式来实现逻辑工作组的划分与管理。
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