2022—2023学年度高三一轮复习摸底测试卷生物衡水金卷先享题

2022—2023学年度高三一轮复习摸底测试卷生物衡水金卷先享题,收集并整理关于2022—2023学年度高三一轮复习摸底测试卷生物衡水金卷先享题得系列试卷及其答案，查看更多衡水金卷先享题摸底卷完整的试卷及其答案请关注WX公众号：趣找答案

1、2022—2023学年度高三一轮复习摸底测试卷生物衡水金卷先享题

2、衡水金卷先享题摸底卷2022-2023学年度高三一轮复习摸底测试卷语文

3、衡水金卷先享题2022-2023化学一轮复习摸底三答案

20.解:(1)设F1(-(,0),F2(,0),在直线方程x=my+1中,令y=0,得x=1,则c=1又△PQF的周长为4√2,所以4√2=4a,所以a=√2,所以b2=a2-c2=1,故椭圆E的方程为2+y=1(4分)(2)设P(x1,y1).Q(x2,y2),则M(-x1,-y1),r-m由x2+2y2=2消去x,得(m2+2)y+2my-1=0,A=(2m)2+4(m2+2)>0所以y+y2=–2m+2yy=(8分)易得S△M=25m0=2×21OF21×(1y1+y?1)=1y1-y2yI+y2)2-4y1y272⊥9)2+2+2^(m2+令m2+2=(t≥m2+1)8(=1)=-8(1-1)2+2,m2+2)t2故当1=2,即m=0时,(m2+2)取得最大值2,+1)此时△PQM的面积取得最大值√2

In the future, I’m dying to be a doctor. For one thing, if I am a doctor, I can make useof what I have learned to relieve patient’s pain s and even save their lives. For another, Ihave always been keen on Chinese medicine, which features magic effect. Should I be admittedto a medical college this year, I would make every effort to rediscover the value of Chinesemedicine, making it more popular in the world. Yours, Li Hua Dear John, I’m glad to receive your e-mail asking me about my future career plan. Here I want to share it with you. As amatter of fact, I want to be a translator. To begin with, I’m fond of languages, and my English is always secondto none. I appreciate the beauty hiden in literature. In addition, literature is like a bridge which helps peopleunderstand the world better. I do wish the classical Chinese literature works can be conveyed to every cornerof the whole world with my efforts. So what do you think of my plan? I’m looking forward to hearing from you!Yours, Li Hua