问题
填空题
焦油加工的主要任务是获得酚、萘、蒽等纯产品和()等粗产品。
答案
参考答案:洗油沥青
焦油加工的主要任务是获得酚、萘、蒽等纯产品和()等粗产品。
参考答案:洗油沥青
Choose the word or expression which has the same meaning as the underlined part. (选择与划线部分意思接近的单词或词组): 5%
小题2:I don’t like the soup with the unpleasant smell. 小题3:The nurse gave the baby a thorough cleaning after its birth. 小题4:I suppose that you are tired. 小题5:Trees can let out oxygen back into the air. |