[{"data":1,"prerenderedAt":-1},["ShallowReactive",2],{"$fh0MGb1JbrTgOyafb9N8m0_qo8LDZglliedDCud9xJfk":3},{"answer":4,"createTime":5,"id":6,"options":7,"origin":12,"question":19,"related":20,"source":24,"type":25},[],"2025-06-15 04:51:58",200847374,[8,9,10,11],"B","C","B或C","不确定",{"count":13,"courseId":14,"courseImg":15,"courseName":16,"workId":17,"workName":18},180,"cb5338f2bb2cf771f2252d5ca83f753a","https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002F661617742880e7c08cf9cd6baadd6055.png","电工基础","work_44034347","郭润生三相交流复习","三相对称电源(正序)中,比A相超前120&deg;的相是( )相",[21,26,35,44,53,62,72,81,86,91],{"answer":22,"createTime":5,"id":6,"options":23,"question":19,"source":24,"type":25},[],[8,9,10,11],"v1",0,{"answer":27,"createTime":5,"id":28,"options":29,"question":34,"source":24,"type":25},[],200847375,[30,31,32,33],"220&ang;135&deg;V,220&ang;-105&deg;V","220&ang;-105&deg;V,220&ang;135&deg;V","220&ang;-45&deg;V,220&ang;-165&deg;V","220&ang;165&deg;V,220&ang;-45&deg;V","三相正序对称电源,已知&Ugrave;A=220&ang;75&deg;V,则B、C两相电压的相量分别为()",{"answer":36,"createTime":5,"id":37,"options":38,"question":43,"source":24,"type":25},[],200847376,[39,40,41,42],"瞬时值","频率","相量","初相角","三相对称正弦量的()一定相等",{"answer":45,"createTime":5,"id":46,"options":47,"question":52,"source":24,"type":25},[],200847377,[48,49,50,51],"黄色","橙色","绿色","红色","在电力系统中,A相一般用()色表示",{"answer":54,"createTime":5,"id":55,"options":56,"question":61,"source":24,"type":25},[],200847378,[57,58,59,60],"负序","正序","倒序","零序","一般所说的相序是指()",{"answer":63,"createTime":5,"id":64,"options":65,"question":70,"source":24,"type":71},[],200847379,[66,67,68,69],"三相正弦量的瞬时值(或相量)之和一定等于零","对称三相正弦量就是频率相同,有效值相等,相位差相等的三个正弦量","瞬时值之和或相量之和等于零的三相正弦量一定是对称的三相正弦量","以上说法都是错误的","下列关于对称三相正弦量的说法错误的是()",1,{"answer":73,"createTime":5,"id":74,"options":75,"question":80,"source":24,"type":71},[],200847380,[76,77,78,79],"幅值相同","频率相同","相位互差120&deg;","瞬时值之和恒为零","三相对称交流电压的特点是()",{"answer":82,"createTime":5,"id":83,"options":84,"question":85,"source":24,"type":71},[],200847381,[76,77,78,79],"三相对称交流电流的特点是()",{"answer":87,"createTime":5,"id":88,"options":89,"question":43,"source":24,"type":25},[],200847382,[39,90,41,42],"最大值",{"answer":92,"createTime":5,"id":93,"options":94,"question":99,"source":24,"type":25},[],200847383,[95,96,97,98],"0","uA","iB","Up","对称三相正弦量的瞬时值之和恒等于( )"]