2,12,30,()A.50;B.65;C.75;D.56
2,12,30,( )
A.50;B.65;C.75;D.56
相关考题:
计算周期工作制的设备容量时,电焊机换算到()暂载率下。A.50%B.65%C.75%D.100%
2,12,30,( )
A.50;B.65;C.75;D.56