单位体积气体所含粉尘质量,称为气体中的粉尘浓度。
参考答案:对
根据实际情况回答下面的问题。
1. What does your father do?
He is a .
2. How does he go to work?
He goes to work by .
3. What's the capital of China? .
4. Which country is east of China? .
5. What do they speak in Australia? .
企业购买股票所支付价款中包含的已经宣告但尚未领取的现金股利,在现金流量表中应计入投资所支付的现金。