4. 柴油機飛輪係於何衝程中吸收能量？(A)進氣衝程(B)壓縮衝程(C)動力衝程(D)排氣衝程

1. What is the article mainly about? (A)Art is everywhere in our lives and everyone can be a unique artist in some way. (B)People with lower social status can make a fortune and earn respect through education. (C)Seemingly untidy, worthless things can turn into something valuable and positive. (D)Helping others is more gratifying and meaningful than personal achievements.