PRS700电源系统高频DC/DC电路采用()电路,开关管的工作频率为(),本机功率因数为()。
参考答案:FB-ZVS-PWM;300KHz;0.995
I know nothing about the young lady she is from Beijing. [ ]
A. except
B. except for
C. except that
D. besides
进口设备的关税完税价格为()
A.进口设备货价
B.进口设备货价+国外运费
C.进口设备货价+国外运费+运输保险费
D.进口设备货价+国外运费+运输保险费+外贸手续费