多项选择题
A.IEEE802.3ah B.IEEE802.3av C.IEEE802.3b D.IEEE802.3bh
A.EC4B B.GC4B C.EC8B D.GC8B
A.GSCA B.HD32A C.IUPA D.HG1A
A.HSWA B.GSCA C.XG8A D.XACA
A.HSWD B.HU4B C.HG1A D.XG8A
A.距离 B.障碍物 C.同频干扰 D.异频干扰
A.10M B.100M C.1000M D.10000M