题目

Na2FeO4是一种高效多功能水处理剂，应用前景广阔，一种制备Na2FeO4的方法可用化学方程式表示如下：2FeSO4+6Na2O2====2Na2FeO4+2Na2O+2Na2SO4+O2↑，对此反应下列说法中不正确的是(    )A.Na2O2在反应中只作氧化剂B.O2是氧化产物C.Na2FeO4既是氧化产物又是还原产物D.2 mol FeSO4发生反应时，共有10 mol电子转移 答案：A  【解析】通过反应的化学方程式可知，化合价发生变化的元素为Fe和O，氧化剂为Na2O2，还原剂为FeSO4和Na2O2，氧化产物为Na2FeO4和O2，还原产物为Na2FeO4和Na2O，反应转移的电子数为8。本题若不注意容易误选C，认为Na2FeO4只是氧化产物，忽视了Na2FeO4中的负二价氧是还原产物。（一）根据文章内容填表, 每空不超过四个词。Dear Linda,Thank you for your last letter. How are you? I like your photos very much. Here are some photos of my family. I hope you like them, too. In the first photo, I'm eating lunch at home with my parents. In the next photo, my brother and I are at school. We're playing soccer. In the third photo, my sister is reading a book. In the fourth photo, my mother and sister are shopping at the mall(商场). In the last photo, you can see my grandma and grandpa. They are eating dinner at home. My grandparents are really nice. I hope to hear from you soon.PaulWhichWhoWhatwherethe first photo【1】eating lunchat home【2】Paul and his brotherplaying soccer【3】the third photo his sister【4】We don't knowthe fourth photohis mother and sistershopping【5】the last photo 【6】eating dinnerat grandparent's home