阿摩線上測驗
79 According to Answer 1, what is not true about light and radio waves?
(A) They are forms of energy.
(B) They are substances or particles.
(C) They are always in motion.
(D) They are much alike in forms.
答案：登入後查看
統計： A(0), B(0), C(1), D(0), E(0) #3382446
統計： A(0), B(0), C(1), D(0), E(0) #3382446
