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Q:我的家乡在湖北的山区里,我时常看到地质工作者在河流里采集水样。老师说,他们这是在寻找矿藏,通过对这些水样进行化验和分析,就能知道哪里有矿、有什么矿了,这是什么原因呢?
Q: My Hometown In the mountains of Hubei, I often see geologists collecting water samples in rivers. The teacher said that they are looking for mineral deposits. By testing and analyzing these water samples, they can know where there is ore and what ore there is. What is the reason?