野外探险或运动时,尤其是在炎热地区、沙漠地区,水的供应是至关重要的。自然界的水源有以下几类:1.地表水。如江河、湖泊、溪流等。2.地下水。如井水、泉水、地下蓄水池等。3.生物水。如一些植物含有充分的水分,如仙人蕉、竹子、仙人掌等。4.天上水。如雨水、雪水、露水及溶化的冰块等。哪些水可以直接饮用,哪些水要净化才能饮用呢?雨水、泉水、井水、山间流动的溪水可以直接饮用。但是静止的或流动缓慢的水中含有大量有机物及细菌, When expedition or exercise in the wild, especially in hot areas, desert areas, water supply is crucial. There are several types of water in nature: 1. Surface water. Such as rivers, lakes, streams and so on. Groundwater Such as well water, spring water, underground tanks and so on. 3. Biological water. For example, some plants contain sufficient water, such as cactus, bamboo, cactus and so on. 4. Heavenly water. Such as rain, snow, dew and melting ice and so on. Which water can be directly consumed, which water should be purified to drink it? Rainwater, spring water, well water, stream flow of mountain water can be directly consumed. But still or slow-moving water contains a lot of organic matter and bacteria,