2023河北九师联盟答案

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C+义=112.解：设A(x1,y1),B(x2,y2),联立49可得18x2+6m.x十m2-36=0,3x-2y+m=0△=(6m)2-4×18×(m2-36)=36(72-m2)>0,所以-6√2

短文改错About eighth years ago,I went to visit my grandfather during the summer holiday,who lived in a smalleightvillage.One Saturday afternoon.my grandfather asked me A climb a nearby mountain with him.At first.I rantofast,leaving my grandfather behind.However.about twenty minute later.I felt so tired that I stoppedrunminutesrunningand eventually chose to sit down for a rest.Soon,my grandfather reached when I was.He looked for me andwhereatasked,"Have I noticed the beautiful flowers along the way?"I kept silently.My grandfather smiled."Myyousilentdear.you are not in a race and on a journey.After that,my grandfather and I had walked slowly.appreciatingbutthe scenery and laughing along the way.