若单项式-4x2y和-23xmyn的和还是单项式,则m、n的值分别是( ) A. 发布时间:2017-05-25 23:27 │ 来源:www.tikuol.com 题型:选择题 问题: 若单项式-4x2y和-23xmyn的和还是单项式,则m、n的值分别是( )A.2,1B.2,0C.4,1D.4,0
题型:选择题 —The poor people lived near the highway.—_____ very noisy.A.It must have beenB.They must beC.That might beD.There must be 查看答案
题型:选择题 假设某月餐厅收入60000元,销售成本25000元,期初存货10000元,期末存货12000元,请问当月存货周转率是多少(四舍五入保留一位小数)()A.2%B.2.3%C.2.4%D.2.5% 查看答案