异步电动机的功率因数（   ）。

试卷相关题目

SQL Error: select id,body,options from ***_enewstiku_ where sourceid='69445' and id < 4497261 and id<>'4497261' order by id desc limit 5 SQL Error: select id,body,options from ***_enewstiku_ where sourceid='69445' and id > 4497261 and id<>'4497261' order by id asc limit 5