2022英语周报 七年级新答案

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!

22.解:(1)直线l的普通方程为x+4y-a-4=0.由p=4sin0,得p2=4psin0,又y=psin0,x2+y2所以C1的直角坐标方程为x2+(y-2)2=4……4分(2)由(1)有C1(0,2),圆C1上的点到直线l距离的最大值为4-a+2=3∴a=4士√17.…………10分

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