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【单选题】
双绞线由两根具有绝缘保护层的铜导线按一定密度互相绞在一起组成,这样可以A.
降低信号干扰的程度
B.
降低成本
C.
提高传输速度
D.
没有任何作用
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【单选题】{Perform MapReduce on this poem before answering questions 7 to 12. [Begin Poem] There was a young lady of Niger who smiled as she rode on a tiger; They returned from the ride with the lady inside, an...
A.
of
B.
tiger
C.
the
D.
lady
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【简答题】I have forgotten the name of an old lady who was a customer on my paper route when I was a twelve-year-old boy back in 1954. Yet it seems like just yesterday that she taught me a lesson in forgiveness...
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【简答题】People did not have much expectation on boys as they did on girls in terms of babysitting. 查看材料
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