由于环境因素或人为因素的干扰，致使土地生态系统的结构和功能失_爱下问搜题

搜题请搜索小程序“爱下问搜题”

问题填空题

由于环境因素或人为因素的干扰，致使土地生态系统的结构和功能失调叫______。

答案

参考答案：土地退化

完形填空

This is a Chinese girl. 1 name is Han Mei. She is twelve. She’s in No.3 Middle School. She is in Class One, Grade Two. Jim is 2 American boy. He’s eleven. He is in No.3 Middle School, 3 . Mrs. Wang is their English teacher. She is a 4 teacher. The 5 love her very much .

填空题

经常和一个运算符连用，构成一个运算符函数名的C++关键字是【15】。