方特神秘河谷作文主要写神秘河谷500字左右

Question

方特神秘河谷 作文
主要写神秘河谷 500字左右

Answer 1

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 to the direct cause of pollution is:because people are littering.Survey recommendations:We hope that each and every Persil Area residents can protect the environment of Lake Persil,Persil because we have to protect the lake,the people responsible