下列各式中,正确的是( ) A.3a+b=3ab B.23x+4=27x C.- 发布时间:2017-05-21 21:44 │ 来源:www.tikuol.com 题型:选择题 问题: 下列各式中,正确的是( )A.3a+b=3abB.23x+4=27xC.-2(x-4)=-2x+4D.2-3x=-(3x-2)
题型:选择题 The modeling business is by no means easy to get into, while the good model will always be in ________.[ ]A. demand B. needC. trouble D. lack 查看答案