题目

结合本题所设置的情景，在每个空白处填入适当的内容完成下列对话。A: How are you today?B: Very well, thanks. A: I'm fine, too. Do you like playing basketball?B: And I often play basketball with my classmates. A: Does your brother like playing basketball, too?B: He only likes playing football. A: When do you usually play basketball?B: I usually play basketball after school. A: I see. B: It's five o'clock. A: Let's go and play basketball.B:将足量的O2  CH4  Na2O2置于一密闭容器中，用电火花反复多次引燃，完全反应后容器内压强为零（150℃），且剩余物质溶于水无气体产生，则O2  CH4  Na2O2的物质的量之比为A．1∶2∶6B．1∶2∶3C．6∶3∶2D．3∶2∶1