单项选择题
A.R-SLIP B.T-SLIP C.OSC-RDI D.OSC-REI
A.G.958 B.G.957 C.G.891 D.G.892
A.4.2dBm B.1.5dBm C.5.5dBm D.6.5dBm
A.-25dBm B.-48dBm C.-28dBm D.-35dBm
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