2021-2022 英语周报 高二 HZ 32答案

2.c【解析】本题考查能级跃迁和光电效应方程。大量氢原子由n=5能级向低能级跃迁时,可辐射C3=10种不同频率的光,其中由n=5能级跃迁到n=1能级时辐射光子能量最大,频率最大,不易发生衍射现象,A错误;氢原子从n=4能级向n=3能级跃迁时辐射出光子的能量为E4-E3=-0.85eV51eV)=0.66eV,B错误;氢原子在n=3能级电离所需的最小能量等于E-E3=0(-1.51eV)=1.5leV,能量为3.4eV的光子能使n=3能级的氢原了发生电离,C正确;氢原了由n=3能级跃迁到n=2能级辐射出的光子的能量为E3-E2=-1.51eV-(-3.4eV)=1.89e<4.54eV,不能使金属钨发生光电效应,D错误【关键点拨】解答本题的关键是理解氢原子能级跃迁发出光子的能量是不连续的,光子的能量由两个能级的能量差决定。

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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