A.超聲波 B.紅外 C.環(huán)形線圈 D.視頻
A.10.0.0.0~10.255.255.255 B.11.0.0.0~11.255.255.255 C.12.0.0.0~12.255.255.255 D.10.200.0.0~10.255.255.255
A.4 B.6 C.8 D.10