______ it rain heavily tomorrow, we would have to put off the visit to the Forbidden City.

A．Were

B．Should

C．Would

D．Will

当校验发电机断路器开断能力时，下列哪条规定是错误的（）？

A.应分别校核系统源和发电源在主弧触头分离时对称短路电流值

B.应分别校核系统源和发电源在主弧触头分离时非对称短路电流值

C.应分别校核系统源和发电源在主弧触头分离时非对称短路电流的直流分量

D.在校核系统源对称短路电流时，可不考虑厂用高压电动机的影响