2022八上英语周报28答案

22.解:(1)双曲线x2-y2=2的焦点为(±2,0),离心率为√2,由题意,c=2,2解得a=2√2∴b2=a2-c2=4,椭圆C1的方程为+4=1(3分)(2)当直线AB斜率不存在时,不能构成△ABD,不符合题意当直线AB斜率存在且不为0时,设直线AB的方程为y=kx+2,直线CD的方程为y=-kx+2圆心(0,0)到直线AB的距离为d(5分)k2+1直线AB被圆C2所截得的弦长AB|=2√8-d4√2k2+(6分)由得(k2+2)x2-8kx=0,△>0,y=-kx+2,8k2k2-4∴xD=k2+2,y=k×k2+2+2=k2+2(8分)

语篇导读】本文是一篇应用文,介绍了九不剧以及它们的创作者。1A【解析】细节理解题。根据 Australian ComedCosi(5th Round )H Date: April 12-16 7: 30 p. m.:Venue: Beijing Poly Theatre Price: 800-1, 500 yuan可知,答案为A2.C【解析】细节理解题。根据 Twelfth Night By TNTTheatre Britain #f Viola (who pretends to be a boy fallsin love with Orsino. But Orsino in turn is in love withOlivia. When meeting"Viola, Olivia falls in love withher, thinking she is a man.可知,答案为C3.D【解析】细节理解题。根据 Jazz WeekendThomas Enhco Piano Recital #f He is spotted by PeterErskine, who offer to help with Thomas Enhco's firstyCD.In 2004-2005, Thomas creates and records his fiafirst album, esquisse, which is released in200可知是答案为D。

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