Can dogs and cats live in perfect harmony in the same home? People who are thinking about

已知代数式x-2y的值是5，则代数式15-x+2y的值为________．

10解析分析：由代数式x-2y的值是5可以得到x-2y=5，然后代入15-x+2y即可求值．解答：∵代数式x-2y的值是5，∴x-2y=5，∴15-x+2y=15-（x-2y）15-5=10，故

我检查一下我的答案

就是这个解释

(答案→)D 解析：试题分析:本文是一篇说明文，说明了狗和猫可以和平相处，它们相互学习、理解自己的语言，通过这篇文章，人们也应该和平相处，积极打造和平世界【小题1】推理题，由第一段最后一句Two-thirds of the homes interviewed reported a positive relationship between their cat and dog可以推出答案，故选D。【小题2】细节题，由第二段第三行reason for this is probably that some of their body signals are just opposite可以知道答案，所以选C。【小题3】细节题，由第二段最后一句They are learning how to talk each other’s language. It is a surprise that cats can learn how to talk ‘Dog’, and dogs can learn how to talk ‘Cat’可以知道答案，所以选C【小题4】推理题，由第四段第一句话The significance of this research on cats and dogs may go beyond pets可以推出答案，所以选B【小题5】推理题，由最后一段最后一句If cats and dogs can learn to get along, surely people have a good chance和第一段第一句Can dogs and cats live in perfect harmony in the same home?可以推出答案，所以选A