如图所示三相电路，断开开关S时，电流表A的读数为10A，若闭合开关S，则电流表A的读数为（   ）。

试卷相关题目

SQL Error: select id,body,options from ***_enewstiku_ where sourceid='69035' and id < 4471154 and id<>'4471154' order by id desc limit 5 SQL Error: select id,body,options from ***_enewstiku_ where sourceid='69035' and id > 4471154 and id<>'4471154' order by id asc limit 5