2022 英语周报 七年级 新目标 39答案

第二节书面表达【写作思路】根据试题要求,考生需要写一篇记叙文,记述身边一位值得尊敬和爱戴的人。首先考生需要介绍自己最尊敬和爱戴的人是谁,简单地介绍一下他(她)。然后,陈述为什么他(她)值得尊敬和爱戴。最后,可以对前文进行一个总结,使文章结构严谨。本文的写作重点在"尊敬和爱戴的原因",考生可围绕这个要点适当拓展,从性格特点、处事风格等方面展开写作。【范文赏读】The most beloved and respected person around me is my teacher, Ms LiThough she has been teaching English for twenty years, she is still passionateabout teaching. She is kind and considerate towards us just like our dear motherWe all respect her because she always tries new ways to make her classes livelyand interesting. Hardworking and knowledgeable, she is one of the best teachersin our school. When we have a problem, we will turn to her for help. She alwaystalks to us patiently and helps us to find a solution. In our eyes, she is not onlyour teacher, but also our best friend. Those are why she deserves our respect【亮点词句】亮点词汇: beloved, respected, be passionate about, be consideratetowards, turn to sb. for help, in one's eyes亮点句式:Why引导的表语从句( why she deserves our respect)

26.B【解析】果胶酶是一类酶的总称,探究果胶酶的最适温度时,需将底物和酶分别在同等温度下处理后再混合,目的是控制单一变量,而无关变量要相同且适宜;高温、过酸、过碱都会破坏酶的空间结构使酶失活,酶的活性不能恢复,低温使酶活性降低,但没有破坏酶的空间结构,酶的活性可以恢复;探究果胶酶的最适温度和最适pH实验中,反应时间等是无关变量,实验中应严格控制酶作用时间;果胶酶是蛋白质,在果胶酶溶液屮加入双缩脲试剂可发生紫色反应。故选B。

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