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电容器放电: V(t) = V_0 \e^(-t/tau) , tau = RC 。对 ,F,V:(a) ?(b) s?(c) V 时?
电容器放电: V(t) = V_0 \e^(-t/tau) , tau = RC 。对 ,F,V:(a) ?(b) s?(c) V 时?
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