問題詳情
840.有一輪系，由A、B、C、D四個齒輪依序以單式輪系組成，A輪是主動輪，D輪是從動輪，如果A、B、C、D這四個齒輪之齒數比為1：2：3：4，此輪系之輪系值為
(A) - 1/
(B) 1/
(C)
(D)－4。
(A) - 1/
(B) 1/
(C)
(D)－4。
參考答案
答案：A
難度：適中0.684783
統計：A(63),B(11),C(2),D(9),E(0)
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