问题
问答题 简答题
颜料是什么？
答案
参考答案：
指一些白色或有色的化合物，不容于水或溶剂中，而有良好的遮盖力，能使其他的物质着色。
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颜料是什么？
参考答案：
指一些白色或有色的化合物，不容于水或溶剂中，而有良好的遮盖力，能使其他的物质着色。
| 完形填空。 | |||
| My dearest Aunt Mei lives in the __1__. She grows __2__ there and sells them in town. Sometimes she can't sell out all the vegetables, __3__ she brings (带来) some to us. Aunt Mei is old and short, but she's very __4__. She can walk __5__. Aunt Mei has no__6__ and she lives with her only white cat. Every summer, I go to stay with her for a week or two. She often __7__ me to a farm nearby (在附近). Life in the country is interesting. I can go fishing and I can __8__ birds singing. But Aunt Mei doesn't __9__ me swim. She says it's dangerous. Now the farmers (农民) don't do farm work __10__ animals. They use tractors. All of them look happy. | |||
| ( ) 1. A. farm ( ) 2. A. vegetables ( ) 3. A. but ( ) 4. A. fine ( ) 5. A. slowly ( ) 6. A. money ( ) 7. A. brings ( ) 8. A. look ( ) 9. A. agree ( ) 10.A. for | B. school B. rice B. so B. good B. fast B. food B. takes B. read B. like B. with | C. country C. wheat C. or C. happy C. near C. home C. lets C. listen C. let C. from | D. town D. animal D. and D. interesting D. far D. children D. wants D. hear D. ask D. between |
x C（g）+2D（g），在10min后，容器中c（A）="0.1" mol·L－1