题目

下列反应中属于加成反应的是( ) A. 乙烯使溴水褪色    B. 将苯滴入溴水中，振荡后水层接近无色 C. 乙烯使酸性KMnO4溶液褪色    D. 甲烷与氯气混合，黄绿色消失 答案：A根据你所听到的内容，填写下面所缺的信息单词。     My name is Bill. I have a 1______ sports collection. I have nine volleyballs, seven 2______ and eight soccer balls. John is my 3______. He has a sports collection, too. He has five baseballs, 4______ tennis rackets and two ping-pong bats. He 5______ sports every day.