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【单选题】
下面哪一项正确描述了OSI参考模型的数据链路层?A.
把数据传输到其它他的网络层
B.
为应用进行提供服务
C.
提取弱信号，过滤信号，放大信号，然后以的方式在网络中发送这些信号
D.
为物理链路提供可靠的数据传输
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反馈参考答案：
举一反三
【单选题】Most workers learn what is expected from them on the job from group ________.
A.
roles
B.
size
C.
cohesiveness
D.
norms
【单选题】Prior to 1975, union efforts to organize public-sector clerical workers, most of whom are women, were some- what limited. The factors favoring unionization drives seem to have been either the presence...
A.
professionals
B.
managers
C.
clerical workers
D.
service workers
E.
blue-collar workers
【判断题】房子着火了,里面的人面临着死亡的危险。(in danger of) The house was on fire and the people inside were in danger of losing their lives. 2. 他买不起这么好的房子。(can afford to do) He cannot afford to buy such a nice house. 3. 这个主意听...
A.
正确
B.
错误
【简答题】查找8位编码: 羊毛制围巾( )兔毛皮围巾( )纸围巾( )
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