阿摩線上測驗
24. Which step of a pilot ladder should be a spreader?
(A) 4th step.
(B) 5th step.
(C) 6th step.
(D) 7th step.
答案：登入後查看
統計： A(43), B(130), C(44), D(42), E(0) #3009045
統計： A(43), B(130), C(44), D(42), E(0) #3009045
