RTU的光纤数字通道出口波形不正确与调制解调器无关。
参考答案：对
He tried very hard to ______ the authorities of his capabilities and loyalty, only to find that the more he tried, the less they believed him.
A．tell
B．show
C．convince
D．encourage
打毛灰的粘结层采用______的水泥石灰砂浆(砂过3mm筛)，略掺麻刀或纸筋。
A．1:0.05:0.5
B．1:0.1:1
C．1:0.5:1
D．1:1:2
