两个电容并联，容值分别为6PF和1.5MF,等效电容为（）。

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SQL Error: select id,body,options from ***_enewstiku where sourceid='32631' and id < 2594743 and id<>'2594743' order by id desc limit 5 SQL Error: select id,body,options from ***_enewstiku where sourceid='32631' and id > 2594743 and id<>'2594743' order by id asc limit 5