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3.B【考查点】本题考查化学实验基础。【解析】浓硫酸具有强氧化性，易将H,S氧化，故不能用浓硫酸干燥H,S气体，A错误；高锰酸钾与浓盐酸反应制备氯气不需要加热，浓硫酸可以干燥氯气，B正确；盐酸具有挥发性，制得的CO2中混有HCl气体，HC1与Na,Si0,溶液反应生成H,SO沉淀，C错误；常温下，铁遇浓硝酸发生钝化，故不能制备N02气体，D错误。
Dear Peter,I'm more than delighted to hear from you.Knowing your awesome project,I can't agree more.Asfor your letter asking for my advice,I'm writing toshare it with you.Firstly,it's suggested that you make a surveyamong the students in your school,which can give youa definite direction.Besides,you're supposed to seekhelp from the students who are also enthusiastic aboutChinese traditional culture to cooperate together.Finally,it's a good idea to host some activities such ascalligraphy exhibition,tea ceremonyandpaper-cutting etc.I do hope my advice will be of great value.Looking forward to your good news.Yours,Li Hua
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