6.D【解析】根据控制变量法,若选择Ⅱ和Ⅲ探究硫酸铜对反应速率的影响,Ⅱ的温度必须控制在35℃,A项错误;收集相同条件下等体积的气体所需的时间越长,反应速率越慢,B项错误;各组实验中硫酸的浓度均相同,无法探究硫酸浓度对反应速率的影响,C项错误;的温度应为35℃,则反应速率:Ⅱ>,Ⅲ中锌与置换出的铜及硫酸构成原电池,则反应速率:Ⅲ>Ⅱ,Ⅳ中CuSO4用量过多,置换出的铜可能覆盖在锌表面阻止反应进行,从而使反应速率大大减小,故反应速率的大小关系可能为Ⅲ>Ⅲ>1>Ⅳ,D项正确

第二节书面表达【写作指导】人称第一人称时态一叙述做家务的经历时用一般过去时描述感受和收获时可以使用一般现在时要点1:具体描述自己帮助父母做家务的经历,比如洗衣、做饭、打扫卫生等,也可以要点}简单介绍一下为什么想要柿助丹做家务要点2:讲述你做家务后的感受和收获,比如体会到了劳动的不易和父母对自己的爱更加理解父母、更加热爱劳动等【佳作展台】One Sunday, my parents went out to the supermarket, and it occurredto me thatgive ourcleanup Firstly, I collectedthe clothes hung out, folded them and put them in the wardrobe. Then Idusted the living room and put all things in place. After that, I swept andpped the floor. When my parents came back, seeing the living roomtidy and the floor shining, they looked at me in surprise and then gave mea big hug. Tired as I was, I felt so happy. Through this experience, Igained deeper insight into the glory of labour. i decided to help with thehousework whenever i can【亮点梳理】亮点词汇: occur to st,, thorough, cleanup,foust, in place, in surprise, insight, glory f亮点结构:tht引导的主语从句( that i could give our home ahorough cleanup),非谓语动词短语作状语( seeing the living room tidyand the floor shining),as引导的让步状语从句的倒装( Tired as Iwas)等

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