下图所示电路中，在t=0瞬间将开关S断开，则u（0+）=（）。 

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SQL Error: select id,body,options from ***_enewstiku where sourceid='32631' and id < 2594731 and id<>'2594731' order by id desc limit 5 SQL Error: select id,body,options from ***_enewstiku where sourceid='32631' and id > 2594731 and id<>'2594731' order by id asc limit 5