Crude oil must be and then can be used. (refined / extracted)
举一反三
- When oil is refined, many products can be obtained.Which is not included( )。
- Crude oil prices are important in determining gasoline prices because crude is the primary raw material used to produce gasoline and other petroleum products.
- If diesel oil in this tank is used， the （） of the oil must not exceed 120 degree F.
- The ration of A260 to A280 can be used to evaluate the purity of extracted DNA.( )
- Crude oil prices are important in determining gasoline prices because crude is the primary raw material used to produce gasoline and other petroleum products. A: 正确 B: 错误