下列各式中,运算错误的是[ ] A.5x﹣2x=3x B.5mn﹣5mn=0 C 发布时间:2017-05-22 12:57 │ 来源:www.tikuol.com 题型:选择题 问题: 下列各式中,运算错误的是 [ ]A.5x﹣2x=3xB.5mn﹣5mn=0C.4x2y﹣5x2y=﹣1D.3x2﹣x2=2x2
题型:选择题 Can _____ be in the desk _____ you have put my letter?A.it;whichB.I;WhereC.you;in whichD.it;that 查看答案