空气中相对湿度(),物料中的水分蒸发较快。
A、越大
B、越小
C、适中
D、无关
参考答案:B
用括号内单词的适当形式填空。
1. Here _____ (be) your library card
2. I want _____ (buy) a new computer.
3. You can _____ (find) out the answer to the question.
4. Where _____ (be) the book about animals? .
5. They are going to make a big hamburger in two _____ (day) time.
计量经济模型分析经济问题的基本步骤。