| − | [[文件:RC_Series_Filter_(with_V&I_Labels).png|300x500像素|thumb|right|串联RC电路,引自<ref name='wikipedia rc circuit'>https://en.wikipedia.org/wiki/RC_circuit</ref>]] | + | [[文件:RC_Series_Filter_(with_V&I_Labels).png|300x500像素|thumb|left|串联RC电路,引自<ref name='wikipedia rc circuit'>https://en.wikipedia.org/wiki/RC_circuit</ref>]] |