题目: 表示x和y成反比例的关系式是( )A.x+y=k(k一定)B.y=kx(k一定)C.xy=k(k一定)D.x-y=k(k一定) 答案: 表示x和y成反比例的关系式是:xy=k(一定);故选:C.
题型:选择题 —Sue wants to go to different places, but she doesn’t know the____.—A map will help, I think.A.timeB.priceC.wayD.interest 查看答案