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5类双绞线输属于数据链路层

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74LS161的LD载数功能是异步实现的。

Members of the government acknowledge that many of their predictions were over-optimistic. => Members of the government acknowledge many of their predictions ____ over-optimistic.

2. ________________, Forsyth, Leary, and Miller (1980)

移位寄存器只能左移数据或者右移数据,不存在又可以实现左移又能实现右移的寄存器。

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