阿摩線上測驗
24. How much time is required for emitting smoke by lifebuoy self-activating smoke signals as
per LSA Code (International Life-Saving Appliance Code)?
(A) At least 10 minutes.
(B) At least 15 minutes.
(C) At least 20 minutes.
(D)At least 25 minutes.
答案：登入後查看
統計： A(159), B(455), C(65), D(61), E(0) #3077031
統計： A(159), B(455), C(65), D(61), E(0) #3077031
