某型号单相电能表铭牌上标明,K=0.5Wh/r,该表每千瓦·时为()转

某型号单相电能表铭牌上标明,K=0.5Wh/r,该表每千瓦·时为()转

A.1800

B.2000

C.2400

D.3000

正确答案是B