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【单选题】
生成树端口的哪种状态接收 BPDU,学习 MAC 地址,不转发数据帧?
A.
A:A.Blocking;B:B.Listening;C:C.Learning;D:D.Forwarding;
B.
A:A.Blocking;B:B.Listening;C:C.Learning;D:D.Forwarding;
C.
A:A.Blocking;B:B.Listening;C:C.Learning;D:D.Forwarding;
D.
A:A.Blocking;B:B.Listening;C:C.Learning;D:D.Forwarding;
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【单选题】贯穿骨盆腔各平面中心点的假想轴线称为
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B.
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