中断供电将发生爆炸、火灾及严重中毒的负荷为( )。
A．一级负荷
B．二级负荷
C．三级负荷
D．一级负荷中特别重要的负荷
参考答案：D
Americans who consider themselves ______ in the traditional sense do not usually hesitate to heap criticism in domestic matters over what they believe is oppressive or wasteful.
A．pedestrian
B．penchant
C．patriarch
D．patriotic
一个其父亲为色盲的正常女人与一正常男人婚配，预期其子女的类型及比率如何
