题目

--- How did you find your visit to the museum, John?    --- ______    A. By taking a No. 3 bus.         B. Oh, wonderful, indeed.    C. I went there alone.       D. A classmate of mine showed me the way. 答案：B 解析: How did you find your visit...?你觉得那次对……的参观怎么样？完成下列物质的分类 （2分） ①洁净的空气，②自来水，③氧化铁，④磷，⑤二氧化碳气体，⑥高锰酸钾，⑦铁水，⑧液氧属于化合物的是               属于混合物的是