粒度组成
参考答案：
是煤样中各粒度级的产率和质量的分布情况。
根据括号内的汉语提示,写单词完成句子。
1. She _____( 寄) a postcard to her mother yesterday.
2. Here is a map of ______( 欧洲).
3. I often swam in the ______( 湖) near my house when I was young.
4. My grandpa lives in the ______( 农村).
5. Jerry couldn't stand city life and went back to _______( 大自然).
简述孔子的音乐观？
