如图所示直流电路，直流电压表的正极性端与的同名端相连，当开关闭合--瞬间，电压表指针的变化为（） 

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SQL Error: select id,body,options from ***_enewstiku where sourceid='32674' and id < 2599252 and id<>'2599252' order by id desc limit 5 SQL Error: select id,body,options from ***_enewstiku where sourceid='32674' and id > 2599252 and id<>'2599252' order by id asc limit 5