19考查目标本题考个直线与椭圆的位置关系、面积问题,气起理和数学运算能力思路点接(1)根据△D的长和真线PF的的个b,的方程组求解:(Ⅱ)先利用弦长公式表示出1AB,再用点到直出的距离公式表示出原点到直线的距高,然后根据而积条什线的科率参考答案(1)因为1F1F21+1PF,1+1PF21=61PF11+1PF21=2,所以2n+2c=6,即a+c=3因为PF2与、轴币直,直线PF1的斜率为3÷1解科,即八(2)所以32=3,所以6=-2由2+b2=n2,得2+3=n2,理得a=2c所以a=2,r=1,b=3所以椭圆C的标准方科为+=1.…(1)由题意得直线!的斜半行在,设的方程为y=b2Mn平珍吸B(xz,y?)把)=x214+x2=1得(3+4k)2-16kx+4=0由4=(-166)2-16(3+412)=48(4k2-1)>0,得12y」16ktr所以x+x2=3+4k2AB1=1+k1、-x21=1+.√48(421N3+4k2.18分)3+4原点O到直线l的距离d=4所以SAO1B2×43√4k2-13+1=、5,得16-402+3=0-y23+4k所以k=2,所以直线1的方程为=2--2243育线m平行,儿何体的表面积考查坐明

第二部分:参考范文was stuck for five or six minutes though it felt much longer. How I wished I had not actedo foolishly, making myself a laughing stock of my family! I could well imagine how they wouldok when my head come out. Seeing my repeated efforts but in vain, Jason rushed out of theoom and turned to Dad for help. Seeing me caught in such a situation, Dad was unexpectedlysurprised, but soon surprise transformed into laughter. He tried my approaches, and eventuallymanaged to gt my head out by carefullythe pumpkin open with a knife. Just when I feltrelieved to be freed form the pumpkin, I suddenly found that mon should be shooting all thathappened to me and would upload it onlineThat video was posted online the Monday before Halloween. It went viral immediately. Justwithin hours, hundreds of likes and funny comments appeared, showing their enthusiasm.Constant streams of curious people even came by to take photos with us and my prized pumpkinJson was really excited and Mon was glad that her video should become such a hit and thus greweven crazier about shooting videos. But for me, though a little embarrassed, I soon totally forgotInforgettable"incident and set out for the trick-or treating. i would like to take it as a treat toadd joy and un to this festive Halloween for everyone.原作续写I was stuck for five or six minutes though it felt much longer. The video cuts before myrescue Dad got me to push my head farther into the pumpkin so Mom could reach in and undonytail. I emerged withose plugged with pulp(糊状物)hat Facebook video went up the Monday before Halloween, and by the end of that day it hadover 1.000People asked MonYou Tube, and by wednesdaygetting 5then the international me.- the video startedracking up hundreds of thousands of views. When I went on a youth camp, I was rebychildren I've never net. The pumpkin also became a minor celebrity. Passers-by and trick-orwould knock and ask, "which is Rachel's pumpkin? "before taking selfies with itAlthough our pumpkin carving the following year was a more sedate affair, I wouldn't sayhide-and-seek and became hopelessly jammed It was Dad who responded to my cries for achorearned my lesson. A few months later I squeezed myself into a laundry basket during a game

以上就是英语周报2018-2022高一外研第55期答案，更多英语周报答案请关注本网站。

本文地址： http://www.ncneedu.cn/post/10226.html

文章来源：admin

版权声明：除非特别标注，否则均为本站原创文章，转载时请以链接形式注明文章出处。