异步电动机直接起动的缺点有（   ）。

试卷相关题目

SQL Error: select id,body,options from ***_enewstiku_ where sourceid='69328' and id < 4488231 and id<>'4488231' order by id desc limit 5 SQL Error: select id,body,options from ***_enewstiku_ where sourceid='69328' and id > 4488231 and id<>'4488231' order by id asc limit 5