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【单选题】
某单位已经组建了多个Ethernet工作组网络,如果计划将这些工作组网络通过主干网互联,那么下面(10)是主干网优选的网络技术。
A.
帧中继
B.
ATM
C.
FDDI
D.
千兆以太网
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【单选题】HRC是( )的一种表示方法。
A.
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B.
努氏硬度
C.
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D.
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A.
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B.
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C.
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【单选题】HRC 是( )的一种表示方法。
A.
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B.
洛氏硬度
C.
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D.
肖氏硬度
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