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【多选题】
LLC子层的功有是什么( )A.
数据帧的封装和解封装
B.
控制信号交换和数据流量
C.
介质管理
D.
解释上层通信协议传来的命令并且产生响应
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举一反三
【单选题】Body Language: A person who is standing tall with shoulders back looks ______.
A.
confident
B.
shy
C.
weak
D.
worried
【单选题】No one likes a person who _____ himself more than anyone else.
A.
looks for
B.
belong to
C.
cares about
D.
gives up
【简答题】如果函数组y 1 ，y 2 ，…，y n 的朗斯基行列式恒等于零。则能否断言，这些函数是线性相关或线性无关的?
【判断题】A person who looks over the heads of his or her audience to avoid looking at any individual is called balcony gazer . A person who looks at one or two audience members or who only looks in one directi...
A.
正确
B.
错误
【简答题】如何判断两个函数是线性相关还是线性无关?
【单选题】A doctor is a person _________ looks after people’s health. [ ]
A.
which
B.
when
C.
who
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