【单选题】正序对称三相电压源作星形联接,若相电压 V则线电压 等于( )。
【单选题】对称正序三相电源作星形联接, 若相电压uA=100 sin(ωt+60°)V,则线电压uAB=___ V.
【单选题】电容场法短波、超短波治疗时哪层组织产热最多
【单选题】电容场法短波、超短波治疗时哪层组织产热最多是:
【单选题】What did hunters used to do with the frogs that they captured?
B.
They used their skins to make dyes.
C.
They collected the frogs’ poison.
D.
They used them to make medicine.
【单选题】电容场法短波、超短波治疗时哪层组织产热最多