随着科学技术的不断进步,研究物质的手段和途径越来越多,H3、O4、C60、N5+等已被发现。下列有关说法中,正确的是( ) A.H2与H3属于同素异形体 B.O2与O4属于同位素 C.C60的质量数为 720g/mol D.N5+中含有36个电子 答案:A-----Let’s go and have a good drink tonight.----- ______. Have you got the first prize in the competition? A. What for? B. Thanks a lot C. Yes, I’d like to D. Why not?