一阶RC电路全响应为V，则电容电压的零状态响应为（    ）。

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SQL Error: select id,body,options from ***_enewstiku_ where sourceid='68466' and id < 4420834 and id<>'4420834' order by id desc limit 5 SQL Error: select id,body,options from ***_enewstiku_ where sourceid='68466' and id > 4420834 and id<>'4420834' order by id asc limit 5