题目内容
振荡幅度逐步减少至消失的电流是（ ）。
2021-10-14
A.等幅振荡电流
B.减幅振荡电流
C.脉冲等幅振荡电流
D.脉冲减幅振荡电流
E.等幅正弦中频电流
试卷相关题目
SQL Error: select id,body,options from ***_enewstiku where sourceid='25685' and id < 2159094 and id<>'2159094' order by id desc limit 5 SQL Error: select id,body,options from ***_enewstiku where sourceid='25685' and id > 2159094 and id<>'2159094' order by id asc limit 5