B.人工放射性同位素放出的能量
C.重核裂变放出的能量
D.化学反应放出的能量
答案:C
I was about to give up the project ______ it hit me_____ I could work with my roommates. That’s to say, I can turn to them for help.
A.that; whether
B.that; when
C.when; how
D.when; that
民办大学的学生不能享受学生票待遇。(部竞赛题)