.图示电路中，既然AB两点电位相等，即，必有 。（   ） 

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SQL Error: select id,body,options from ***_enewstiku_ where sourceid='69506' and id < 4502738 and id<>'4502738' order by id desc limit 5 SQL Error: select id,body,options from ***_enewstiku_ where sourceid='69506' and id > 4502738 and id<>'4502738' order by id asc limit 5