2024届四川省雅安市高三上学期零诊考试文数试卷及参考答案

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Our school had a school choir competition June 20. As Panning, the competition tookonplannedplace in the main hall. I was very nervousafter we began to perform. Hid!"IStartto have thebeforestartedhiccups(t] WM). Lisa advised me to hold my breath and countedto ten, while Amy brought somecountwarm water and asked me to drinkthemwaItMy friends tried to help me in manybut nothingwaysworked."BOO! " Tony frightened me from behind my back. I was Suchsurprised that my hiccupsstopped, At last, we sang inbeautifully harmony on the stage.beautiful

20.解:(1)根据抛物线的定义得,|MF=x+所以/=+=5解得|p=2所以抛物线C的方程为y2=x(4分)(2)设P(a2,a),A(y,y1),B(y,y2),过点P的圆E的切线l:x=m(y-a)+a2

C【语篇导读】本文是一篇说明文。文章主要叙述了加利福尼亚州高大树木数量减少的现状并且分析了原因。8.A【解析】段落大意题。根据第二段可以看出高大树木的数量锐减,且没有地区能够幸免于难,整体形势十分严峻,故选A9D【解析】细节理解题。根据第三段Aggressivewildfirecontrol可知,尽管控制野火但是导致小树和高大的树木争抢生长资源。10.C【解析】细节理解题。倒数第一段对缺水原因进行分析。根据…havebeenrisingtemperatures,whichcausetreestolosemorewatertotheair,andearliersnowmenlt,whichreducesthewatersupply…可知选C。11.A【解析】标题归纳题。根据第一段可知,自从1930s,California失去了一半的高大乔木,下面几段分析了造成这种情况的原因。故选A。