A.頻譜分析儀 B.天線(xiàn) C.低噪放大器 D.UE
A.1 B.2 C.4 D.8
A.1A,1B,1C,1D B.1A,1B,1D,1C C.1A,1C,1B,1D D.1A,1C,1D,1B