题目

The news I told you that the football match was cancelled was not announced formally but ________.     A．in other words              B．word of mouth     C．in a word                    D．word for word 答案：B将Na投入下列溶液，既能生成沉淀又能生成气体的是（ ）A.氯化钠溶液B.硫酸铜溶液C.乙醇溶液D.乙酸溶液