2022 英语周报 高一 41答案

12.A【解题思路】先由函数f(x),g(x)的解析式得到函数f(x),g(x)的图象均关于点(-2,0)对称,进而得函数f(x),g(x)图象的交点也关于点(-2,0)对称,且交点成对出现,然后分别作出函数f(x),g(x)的大致图象,数形结合即可得解【解析】易知函数f(x)=25in(x-)的图象关于点(-2,0)对称,函数g(x)=2的图象也关于点(-2,0)对称,因此这两个函数图象的交点也关于点(-2,0)对称,且交点成对出现作出函数f(x),g(x)的大致图象,如图,(关键:准确作出函数的图象,要注意“草图不草”)分析知,当x∈[-4丌,3m]时,两函数图象有3对(即6个)交点,所有交点的横坐标之和为4×3=-12,故选A【解题关键】解决木题的关键在于得到两个函数的图象都关于点(-2,0)对称,即可利用对称性求出交点的横坐标之和

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)

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