单项选择题
A.-8~-26dbm B.-8~-24dbm C.-10~-24dbm D.-6~-24dbm
A.2FE+4POTS B.3FE+4POTS C.4FE+2POTS D.4FE+3POTS
A.0.8 B.0.9 C.0.95 D.1
A.绝缘B.屏护C.穿工作服
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