题目

根据短文内容，回答下面的问题。 What is a supermarket? In the dictionary, a supermarket is a large self-service department store. Some supermarkets have two floors. When you enter such a supermarket, an elevator will take you to the second floor. Here you can buy things such as CDs, pens, clothes, TVs and refrigerators. After you have collected the things you want to buy on the second floor, you can go downstairs to the first floor where food and drinks are sold. You can also buy fresh fruit, vegetables and meat on this floor.  People like to go shopping in the supermarke 为了研究废电池、满江红(一种水生蕨类植物)对水质的影响，某校化学兴趣小组的同学做了如下实验： 实验一：在5只鱼缸上分别贴标签A、B、C、D、E；各放入3 500 mL未污染的池塘水，在A、B、C、D　4只缸中分别放入一节不同型号的电池(每节打洞，以便有毒物质释放)；E缸作为对照，不放废电池；再向各缸分别放入1条健康、大小和体重相近的同种金鱼，定时喂养，观察并记录情况．结果见下表： 实验二：在5只鱼缸上分别贴标签A、B、C、D、E；各放入3 500 mL未污染的池塘水，向各缸分别放入经过打洞处理的1节同型号废电池；向B、C、D、E缸放入不同质量的满江红．20天后，再向各缸分别放入1条健康、大小和体重相近的同种金鱼；定时喂养，观察并记录情况．结果见下表： 根据以上实验，请分析回答下列问题： (1)通过实验一和实验二分别得出什么结论？ (2)满江红在净化水质中的作用是什么？ (3)根据此实验所得的结论，请你谈谈感想和建议．