A:①②③④
B:①②
C:②③④⑤⑥
D:①④⑤⑥
In addition, I gave five more dollars to her.
一定量的甲烷燃烧后得到CO、CO2及水蒸气,混合气共重49.6g,通过无水CaCl2时,CaCl2增重25.2g,则CO2的质量为( )