题目

----We are going to Beijing to spend the holiday tomorrow. ----            . A. Congratulations.                         B. That' s right. C. Have a good time.                        D. That' s nothing. 答案：C关于2molCO2的叙述，正确的是（相对原子质量 C-12  O-16）（　　）A．质量为88gB．摩尔质量为88g/molC．分子数为1.204×1024个D．常温下，体积为44.8L