2022英语周报高二选择性必修三答案

16.CD【解析】根据I-1与I-2生出Ⅱ-3、I-3与I-4生出Ⅱ-6,且I-1、I-2与I-3、I-4所含致病基因不同,可知该遗传病是由两对位于常染色体上的等位基因控制的,A项正确;假设I-1、I-2含有的致病基因是a,I-3和I-4所含致病基因是b,则I-1I-2的基因型分别为AaBB、AaBB,I-3、I-4基因型分别为AABb、AABb,Ⅱ-3与Ⅱ-4的基因型分别为aBB、AAbb,所以Ⅱ-3和Ⅱ-4的子女均不患病,B项正确;Ⅲ-1的基因型为AaBb,Ⅲ-1与一位基因型相同的女性婚配,子女患该遗传病的概率为1-3/43/4=7/16,C项错误;Ⅱ-2与Ⅱ-5婚配,有三种情况后代携带致病基因:1/3AABB×2/3AABb、2/3AaBB×1/3AABB、2/3AaBB×2/3AABb,故后代携带致病基因的概率为1/3×2/3×1/2+2/3×1/31/2+2/3X2/3×(1-1/2×1/2)=5/9,D项错误。

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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