前段时间,关于我们鲍田里出现肠道传染病的报道铺天盖地,让我们非常紧张。经过有关专家的分析,传染病的源头来自于我们的生活污水中。为此我们在老师的帮助下对学校附近的多条河流进行了调查。我们利用一个多月的时间对附近河流进行观察,坚持写观察日记。而且分4个时间段(分别 Some time ago, there was a lot of coverage about the intestinal infectious diseases in our Bao Tian area, which made us very nervous. After the analysis of relevant experts, the source of infectious diseases comes from our domestic sewage. To this end we conducted a survey of several rivers near the school with the help of our teachers. We use more than a month to observe the nearby rivers, insisted on writing observation diary. And divided into 4 time periods (respectively