产生直流高压的半波整流电路中，高压整流硅堆的额定参数主要有(  ）。

试卷相关题目

SQL Error: select id,body,options from ***_enewstiku_ where sourceid='69489' and id < 4501331 and id<>'4501331' order by id desc limit 5 SQL Error: select id,body,options from ***_enewstiku_ where sourceid='69489' and id > 4501331 and id<>'4501331' order by id asc limit 5