2022英语周报高一课标第4答案

书面表达One possible version:NOTICEA sports meeting will be held in the playground of our school from next Thursday to FridayAs you know, the pressure of study is very heavy now, especially for those senior 3. So the purpose of the sports meeting is to letevery student get relaxed, as a result of which we students can live happily and heal thilyEveryone is welcome to take part in it. Those who perform excellently at the sports meeting will get prizes. But don' t take theresults so serously because taking part is more important than the result. Good luck to everyone!

2.(1)由P=2sine,得=2pmO,…x= pcos,y=psin,代入得:x2+y2=2y曲线C的普通方程为x+y=2,即:x2+(y-1)2=1√2√2t+m由的参数方程2(为参数),消去参数t得:x-y+m=0.=0(2)当=0时,得m. p(o, m)在直线上,√2(2√2t+m-2-t+m=022将l参数方程代入曲线C的普通方程得化简得:+√2(m-1)+m2-2m=0设以上方两根为,,由△m+1)-4(m2-2m)y°解海,1-√5

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