.三相四线制电路中,电源端的三个相电压为UA=UB=UC=220V,三个线电压为UAB=380V,UBC=UCA=220V,说明C相电路发生了断路。( )
发布时间:2025-12-10
A.正确
B.错误
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SQL Error: select id,body,options from ***_enewstiku_ where sourceid='69441' and id < 4497043 and id<>'4497043' order by id desc limit 5 SQL Error: select id,body,options from ***_enewstiku_ where sourceid='69441' and id > 4497043 and id<>'4497043' order by id asc limit 5
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