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一、情境导入,引出辩题师:同学们,大家知道,我国地域辽阔,水资源条件的地区差异大。如果我们乘坐飞机从北向南俯瞰大地,这种感受就会非常深刻。【播放课件】动画演示飞机先从北京飞到郑州,再从郑州飞到广州,分别定格展示水资源供需矛盾的图片。(北方:连片而集中的耕地、高耗水工业、农业缺水和生活缺水的图片;南方:被河湖分割的耕地、被淹没的庄稼和村庄的图片)通过图片的展示,让学生明白南、北方水资源的供
First, the introduction of the situation leads to debating division: Students, we all know that our country has a vast territory and great differences in water resources conditions. If we take a plane from north to south overlooking the earth, this feeling will be very profound. [Broadcast courseware] animation demonstration aircraft flew from Beijing to Zhengzhou, Zhengzhou and then fly to Guangzhou, respectively, freeze grid to show the contradiction between supply and demand of water pictures. (North: pictures of contiguous and concentrated arable land, high water consumption industries, agricultural water shortages and lack of water; South: arable land divided by rivers and lakes, pictures of drowning crops and villages) Understand the supply of water resources in the South and North China