问题
判断题
表面活性剂的作用能降低油污与水及油污与金属表面之间界面张力而产生的湿润、渗透、乳化、增溶、分散等多种作用。( )
答案
参考答案：对
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表面活性剂的作用能降低油污与水及油污与金属表面之间界面张力而产生的湿润、渗透、乳化、增溶、分散等多种作用。( )
参考答案：对
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| 1. We can travel to Yunnan by ___________. 2-3. In all these trips, you should take maps, __________and___________. 4. If three people in your family plan to Shandong, they will pay (付款) ___________. A. 3,500 yuan B. 4,500 yuan C. 6,500 yuan. D. 7,500 yuan. 5. The form (表格) is about ___________. |