干燥过程既是传热过程又是传质过程。
参考答案：对
- You can use MSN to talk with your friend on the Internet.
-I know. But can you tell me_______?
A．what I can use it
B．how can I use it
C．why can I use it
D．when I can use it
猪肉需求曲线左移的原因可能是( )。
A．猪肉价格上涨B．猪肉预期价格上涨C．鸡蛋价格上涨D．鸡蛋预期价格上涨
