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【单选题】
( )是最常用的一类访问控制机制.用来决定一个用户是否有权访问一些特定客体的一种访问约束机制。A.
强制访问控制
B.
访问控制列表
C.
自主访问控制
D.
访问控制矩阵
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A.
Y
B.
N
C.
NG
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【简答题】There have been many technological developments in the 20th. century, for example, computers and electric power. Choose either of the two, describe the changes it has brought about and discuss whether...
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【单选题】A consequence of the lack of technological literacy is that______.
A.
science becomes more important than technology
B.
society will not be able to respond to future challenges
C.
computers don't play an important role in many people's lives
D.
some people are technologically illiterate
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