2023河北高三3月大联考808C数学答案

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2023河北高三3月大联考808C数学答案试卷答案，以下是该试卷的部分内容或者是答案亦或者啥也没有

4.D【试题情境】本题是应用性、创新性題目,属于生活实践情境.【关键能力】本题考查数学建模能力、创新能力、运算求解能力【解析】记甲、乙、丙通过该平台打车分别为事件A,B,C,则P(A)=P(B)3,(C)=2所以甲、乙、内3人中至少有2人通过该平台车的概率P=P(A·B·C)+P(A·B·C)+P(A·B·C)+P(A·B·C)=P(A)·P(B)·P(C)+P(A)·P(B)·P(C)+P(A)·P(B)·P(C)+P(A)·P(B)·P(c1x1×(1-2)*7(1-1))×3x5+2×3×5=30故选D

1.D【必备知识】本题考查的知识是“能进行复数代数形式的四则运算关键能力】本题考查运算求解能力【解析】通解设z=a+bi(a,b∈R),则(a+bi)(3+4i)=(3a-4b)+(4a+3b)i=i,由复数相等得解得则故选D.悅解由x(3+4i)=i得z=i(3-4i)+4i(3+4i)(3-4i)25所以=25-25,故选D

1,所以-1<<2,即g:-1
0),所以由柯丙不等式得3=·后十√瓜·高十反·左≤a++·√日+品+云，√3b2c所以日+十之≥号，当且仅当a=36=2,即a=号b=分c=号时取等号.…10分

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)

2023河北高三3月大联考808C数学答案