阿摩線上測驗
54. What device has NOT been used to solve the railway problem in Japan?
(A) Flashing lights.
(B) Barking speakers.
(C) Noisy train tracks.
(D) Lion face paintings.
答案：登入後查看
統計： A(15), B(54), C(209), D(46), E(0) #2160308
統計： A(15), B(54), C(209), D(46), E(0) #2160308
