A.電量B.非電量C.數(shù)字量D.開(kāi)關(guān)量
A.啟動(dòng)B.停止C.保護(hù)D.事故
A.模擬量B.開(kāi)關(guān)量C.脈沖量D.b 碼對(duì)時(shí)信號(hào)