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问题
单项选择题
以太网物理地址的长度是_______。
A.8bit
B.24bit
C.48bit
D.64bit
答案
参考答案:C
判断题
如图是会车让行标志。()
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选择题
It was _____ dark _____ I couldn't see anything.
A. too; to
B. such; that
C. so; that
D. as; as
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