萃取塔中碳四物料自上向下流动，萃取水是自下向上流动。
参考答案：错
解析：萃取塔中碳四物料自下向上流动，萃取水是自上向下流动。
—________ do you like pandas?
—Because they are beautiful and smart.
A．Where
B．When
C．How
D．Why
可贷资金的供给曲线（Supply curve of loanable funds）
