13. 供單向行駛的界定區域之英文術語為:
(A) Traffic lane
(B) Traffic clearance
(C) Separation zone
(D) Separation line
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統計: A(109), B(12), C(31), D(22), E(0) #3009576
統計: A(109), B(12), C(31), D(22), E(0) #3009576