2022英语周报第23期。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)

23.解:(1)当a=-1时,f(x)=|3x+1|-2由3x+11-2≤5,整理得-7≤3x+1≤7,………………………………………2分解得≤r≤2.因此不等式f(x)≤5的解集为{x1-≤x≤2)1分(2)当x∈R时,f(x)+3g(x)=13x-a|+2a+|3x-3≥|3x-a-3x+3|+2a=|3-a|+2a.……6分当x=1时等号成立,所以当x∈R时,f(x)+3g(x)≥9等价于3-a|+2a≥9.①…7分当a≤3时,①等价于a+3≥9,无解;…………………………………………8分当a>3时,①等价于a-3+2a≥9,解得a≥49分所以a的取值范围是[4,+∞)………………10分评分细则:(1)第一问中,在求不等式f(x)≤5的解集时,去掉绝对值得2分第一问全部正确得4分(2)第二问中,写出f(x)+3g(x)的最小值得2分,后续步骤每讨论一种情况各得2分

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