决定剂油比大小的因素有（）。A、缓冲区 B、吸附区 C、解吸区 D、提纯区
题型：多项选择题
问题：
决定剂油比大小的因素有（）。
A、缓冲区
B、吸附区
C、解吸区
D、提纯区
题型：多项选择题
| 阅读理解。 | ||||||||
| There are many things we need to know, but we do not learn them at school. For example, if we want to use our money wisely, we need to shop carefully. We need to know how to compare (比较) the prices of the things in different shops. We also need to know how to make the best choice when we shop. Knowing how to make such choices is a life skill, and we need to practice it in our daily life.
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| 1. Which supermarket has the longest Business Hours? | ||||||||
| A. Supermarket W. B. Supermarket T. C. Supermarket Y. D. Supermarket M. | ||||||||
| 2. The price of the pork in _____ is the same as that in _____. | ||||||||
| A. Supermarket W; Supermarket M B. Supermarket Y; Supermarket T C. Supermarket W; Supermarket Y D. Supermarket M; Supermarket T | ||||||||
| 3. If you want to spend the least money on eggs, which supermarket will you go to? | ||||||||
| A. Supermarket W. B. Supermarket M. C. Supermarket Y. D. Supermarket T. | ||||||||
| 4. From above, which supermarket may have the fewest shoppers? | ||||||||
| A. Supermarket W. B. Supermarket T. C. Supermarket M. D. Supermarket Y. | ||||||||
| 5. What may be the reason if a shopper usually shops in Supermarket Y? | ||||||||
| A. The Environment. B. The Service. C. The Business hours. D. The Price. |
=f（px；p1p2，…，pi，…，pn；pe；c，ρ）
表示厂商对于x商品的供给