26. 有一脈波之波寬為1ms,週期為5ms,則工作週期應為多少?
(A)20%
(B)10%
(C)40%
(D)30%
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統計: A(260), B(25), C(38), D(13), E(0) #3076597
統計: A(260), B(25), C(38), D(13), E(0) #3076597