问题 计算题 竖式计算并验算。(1)674-142= 验算:(2)963-341= 验算: 答案 (1) 674 - 142 532 验算:532+142=674(2) 963 - 341 622验算:622+341=963 单项选择题 Use the results from the following survey of 500 firms to answer the question.()A.20.4%.B.15.4%.C.3.4%. 查看答案 名词解释 翡翠 查看答案