问题
判断题
粉尘安全标准以粉尘质量浓度表示。它表示单位体积空气所含粉尘的质量,单位为mg/m3。
答案
参考答案：对
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粉尘安全标准以粉尘质量浓度表示。它表示单位体积空气所含粉尘的质量,单位为mg/m3。
参考答案：对
| 阅读理解，完成下面的表格。 | ||||||||||||
| Hello, I'm John. It's 8:00 in the morning. It's time for breakfast. I can drink some milk. It's 9:00. It's time for English class. I can read and write. It's 11:00. It's time for lunch. I can have some chicken. It's 2:00 in the afternoon. It's time for music class. I can sing and dance. It's 4:00. It's time for P. E. class. I can jump and run. It's 6:00 in the evening. It's time for dinner. I can eat some rice.
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