阿摩線上測驗
53. This passage points out that the new communications equipment will be used by the president___________
(A) during national emergencies.
(B) during takeoffs and landings.
(C) during flight training.
(D) during equipment failure.
答案：登入後查看
統計： A(231), B(45), C(69), D(18), E(0) #2085032
統計： A(231), B(45), C(69), D(18), E(0) #2085032
