参考答案:7,120s(2min)
语义理解题。根据diminish所在句子The reason why laughter can reduce pain seems to be that it helps to produ第37题:[单选题]下列哪种情况,自动重合闸装置,不应动作( )。A.线路瞬时故障B.线路永久故障C.断路器状态与操作把手位置不对应引起的跳闸D.用控制开关断开断路器参考答案:D
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