正常人的摆动相约占整个步行周期的（ ）。

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SQL Error: select id,body,options from ***_enewstiku where sourceid='25686' and id < 2158750 and id<>'2158750' order by id desc limit 5 SQL Error: select id,body,options from ***_enewstiku where sourceid='25686' and id > 2158750 and id<>'2158750' order by id asc limit 5