I won't go to his party next time. It couldn't have been ________ in fact.

A．any better

B．any worse

C．so bad

D．the best

某车间有1台整流变压器给主回路采用双并联12脉冲全控三相桥线路的变流装置供电。经计算整流变压器一次容量为3364kV.A，二次容量为3474kV.A，请问该整流变压器的等值容量为()kV.A。

A．6837

B．5128

C．4835

D．3419