阿摩線上測驗
31. When the visibility is reduced to about 4 miles, in practice, we say that visibility is:
(A) exceptional
(B) good
(C) moderate
(D) poor
答案：登入後查看
統計： A(9), B(42), C(172), D(83), E(0) #3407500
統計： A(9), B(42), C(172), D(83), E(0) #3407500
