The aural indication includes firebell sound, two-tone siren sound, and level B caution aural sound. in the above sentence,音响指示不包括
A.火警铃声; ; B.;2种音调的警笛声 C.来话呼叫; D.程度B注意音响声正确答案C
The aural indication includes firebell sound, two-tone siren sound, and level B caution aural sound. in the above sentence,音响指示不包括
A.火警铃声; ; B.;2种音调的警笛声 C.来话呼叫; D.程度B注意音响声正确答案C