阿摩線上測驗
41.1.What is the above passage mainly about?
(A) Why Europeans and Americans stop using petroleum.
(B) How chemists make petroleum less expensive.
(C) How to reduce the costs of producing biofuels.
(D) New chemical solutions to keep the environment safe and clean.
答案：登入後查看
統計： A(147), B(149), C(180), D(2096), E(0) #546799
統計： A(147), B(149), C(180), D(2096), E(0) #546799
