学科网2022年高三5月大联考(全国甲卷) 文综试题答案

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8.D【解析】设直线AB的方程为y=kx十b,y=kx b,A(1,M),B(x2,2).由x2=4y得x24kx一4b=0,进而x1 x2=4k,x1x2=一4b.由|OA,OB|恰好是Rt△OAB的“勾”、“股”(O为坐标原点)，可得OA⊥O范，所以O方·O范=十为=0.又ny=}后×}=6()2,所以Oi.0i=w 6()=-40 6×(-46)2=0所以2-4h=0,解得b=4或b=0(舍)，故直线l的方程为y=kx十4,恒过定点(0,4)

第二节One possible version:One morning,the day nurse arrived to bring water for their baths only to find the lifeless body of the manby the window.He had died peacefully in his sleep.She was saddened and called the hospital attendants to takethe body away.As soon as it seemed appropriate,the other man asked if he could be moved next to the window.The nurse was happy to make the switch,and after making sure he was comfortable,she left him alone.The man was happy to get such a wonderful treat.Slowly,painfully,he supported himself up on one elbowto take his first look at the real world outside.He struggled to slowly turn to look out of the window beside thebed.It faced a blank wall.The man asked the nurse what could have driven his dead roommate who had de-scribed such wonderful things outside this window.The nurse responded that the man was blind and could noteven see the wall.She said,"Perhaps he just wanted to encourage you.