（）的作用是控制液体只能向一个方向流动。
参考答案：单项阀
— Would you like to have a drink with us?
— Drinking? _____. I prefer to stay at home.
A. That isn't my cup of tea
B. I'm with you on that
C. I couldn't agree more
D. Thank goodness
试计算CO2分子量？
