计算题：某农村加工厂根据农时需要进行大米等农副产品加工，10kV受电，变压器容量为315kV·A。某月供电企业对其计费电量为100000kW·h，计算该加工厂当月应交电费。(电价按0.464元/kW·h计算，功率因数调整电费为0，不考虑各项代收费，如收基本电费则按容量计取。)

3- junior high school life will be over . I will remember those things and teachers ____ are unforgotten .

A．who

B．which

C．that

D．Whom