用英语写一篇关于我们如何使用水资源的小报告

The objectives of the survey: living in the contaminated water. Investigation Location: Persil Persil Lake District. Investigators: Lu Jiao Shen,张思成survey instrument: two cups, magnifying glass, fishing nets, rocks, wire, rod. After the investigation: first fishing net fishing that water to pour it into the cup, and then take a cup of clean tap water, and careful observation on the balcony. Persil with a magnifying glass, we found that the lake water and tap water is totally different. Persil lake dirty water more than tap water: the water inside the lake Persil some cyanobacteria, a lot of oil, there are some unknown small dirt. Tap water is not that greasy. We useful stone, wire, rod and do a similar thing with the fishing rod and line on the standard scale well. Thus, we elongate rod fling to the river, stretched out on the start line, until the feeling has come to a rock bottom, we turned back line, look at the stones, above all, some dirty sludge. We feel that Lake Persil lead