阿摩線上測驗
24. Why are energy drinks difficult for scientists to study?
(A) They are produced by big companies.
(B) They change content every year.
(C) They contain many ingredients.
(D) They would hurt the lab equipment.
答案：登入後查看
統計： A(3), B(3), C(43), D(1), E(0) #3912475
統計： A(3), B(3), C(43), D(1), E(0) #3912475
