降压斩波电路中, 设平波电抗为无穷大,一个周期中, 忽略电路中的损耗, 电源提供的能量与负载消耗的能量的比值为( )(0.5)
发布时间:2025-12-01
A.2.0
B.1.0
C.0.5
D.1.5
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SQL Error: select id,body,options from ***_enewstiku_ where sourceid='69429' and id < 4496157 and id<>'4496157' order by id desc limit 5 SQL Error: select id,body,options from ***_enewstiku_ where sourceid='69429' and id > 4496157 and id<>'4496157' order by id asc limit 5
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