测定同步发电机短路特性时，如果转速降低到0.8时,测得的短路特性（ ）

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SQL Error: select id,body,options from ***_enewstiku_ where sourceid='68478' and id < 4421401 and id<>'4421401' order by id desc limit 5 SQL Error: select id,body,options from ***_enewstiku_ where sourceid='68478' and id > 4421401 and id<>'4421401' order by id asc limit 5