七年级外研版第15期英语周报2021-2022学年答案

6.D【解析】浓硫酸与铜反应需要加热，生成的二氧化硫的密度比空气密度大，且属于有毒气体，应采用向上排空气法收集，后加尾气处理装置，图中为向下排空气法，A错误：反应后的混合物中含有浓硫酸，浓硫酸溶于水放出大量的热，稀释时应把反应后的混合物加人水中，并不断搅拌，B错误：过滤时应使用滤纸，并用玻璃棒引流，C错误：硫酸铜性质稳定，可用蒸发皿蒸发结品，D正确。

第一节【参考范文】Dear annieIm Li Hua. Hows everything going these days? I'd like to ask you to write an article for our schools English newspaperThe"Culture field "section is very popular among us students. And here are some relevant details about the articles we areeager for. Would you please write something about how Americans spend their holidays and festivals, which is interesting andinformative? 400 words would be fine. Could we have your article before June 10?I'm looking forward to your replySincerely yoursLi Hua

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