在异步串通信中,表示数据传送速率的是波特率,这里的波特率是指( )
A.每秒钟传送的二进制位数 B.每秒钟传送的字节数C.每秒传送的字符数 D.每秒钟传送的数据帧数
参考答案:A
灭火救援决策是组织指挥的核心。()
High-velocity fog().
A.is a finer,more diffuse water spray than low-velocity fog
B.requires that the water pressure be no greater than 60 psi
C.produces an effective fog pattern no more than 6 feet beyond the nozzle
D.extinguishes a fire by absorbing heat and reducing the supply of oxygen