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
正确答案是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
正确答案是C