文档介绍：节约和保护水资源
several group number, then with b ± a, =c,c is is methyl b two vertical box between of accurate size.
several group number, then with b ± a, =c,c is is methyl b two vertical box between of accurate size. Per-2~3 measurement, such as proceeds of c values are equal and equal to the design value, then the vertical installation accurate. For example a, b, and c valueswhile on horizontal vertical errors for measurement, General in iron angle code bit at measurement level points grid errors, specific method is from baseline to methyl vertical box center line distance for a,, to b vertical box distance for b, list can measured
several group number, then with b ± a, =c,c is is methyl b two vertical box between of accurate size. Per-2~3 measurement, such as proceeds of c values are equal and equal to the design value, then the vertical installation accurate. For example a, b, and c valueswhile on horizontal vertical errors for measurement, General in iron angle code bit at measurement level points grid errors, specific method is from baseline to methyl vertical box center line distance for a,, to b vertical box distance for b, list can measured
several group number, then with b ± a, =c,c is is methyl b two vertical box between of accurate size. Per-2~3 measurement, such as proceeds of c values are equal and equal to the design value, then the vertical installation accurate. For example a, b, and c valueswhile on horizontal vertical errors for measurement, General in iron angle code bit at measurement level points grid errors, specific method is from baseline to methyl vertical box center line distance for a,, to b vertical box distance for b, list can measured
2、水资源时空分布不均，通过教师讲解，帮助学生理解我国水资源时空分布特点，以及对经济社会的影响。理解修水库和跨领域调水的意义。认识主要的引水工程。
3、节约用水保护水资源，让学生认识到节水比调水更重要，帮助学生树立正确的资源观，养成良好的节水习惯，做保护水资源的宣传员。
【教学过程】
教学
环节
教师活动
学生活动
设计意图
创设情境导入新课
[情境导入]：学生猜谜语：双手抓不起，一刀劈不开；煮饭和洗碗，都要请他来。
同学们先来想一想，我们在一天的生活中，哪些地方需要用到水？除了在日常生活中用到水以外，还有什么地方需要用水？如果地球上没有了水，会出现什么景象呢？