34 一般在長陡坡路段,當坡度為多少以上時,即應設險坡標誌?
(A)3%
(B)5%
(C)7%
(D)9%
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統計: A(1), B(1), C(13), D(1), E(0) #1203490
統計: A(1), B(1), C(13), D(1), E(0) #1203490