圍徑3 吋的白棕繩,其破斷力為多少噸?
(A)1
(B)7
(C)3
(D)5
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統計: A(0), B(2), C(40), D(6), E(0) #286256
統計: A(0), B(2), C(40), D(6), E(0) #286256