题目

用所给单词的适当形式填空。 show,celebrate,help,two,tie 1. Look!The boy _____________ his bag to the chair. 2. We have many ways ______________ our love to our parents. 3. Mother's Day is on the ______________ Sunday of May. 4. It’s a good idea ______________ parents do housework. 5. What did they do ________________ Father's Day? 答案:1. is tying 2. to show 3. second 4. to help 5. to celebrate(2006?昆明)有一包白色固体可能含有碳酸钙、硫酸铵、碳酸钠、氢氧化钡,将此固体粉末放入足量水中溶解,除有刺激性气味的气体产生外,出现的白色沉淀有部分溶于稀硝酸[信息:Ba(OH)2属于可溶性强碱].则原白色固体内( )A.一定含有硫酸铵、氢氧化钡、碳酸钠B.一定不含有碳酸钙、碳酸钠、氢氧化钡C.可能同时含有碳酸钙和碳酸钠D.可能含有氢氧化钡和硫酸铵
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