英语周报2022高二能力提升答案

cos22.解:(1)由为参数)消去p,得+y=3sin即曲线C的普通方程为+2=1.(3分)由2i(+x)=4,得0+08=4,将psin=y,pco6=x代人上式,得直线L的直角坐标方程为x+y-4=0.(5分)(2因为点P在曲线C上,所以可设点P(2cosg,3sin p)所以点P到直线L的距离d=2cosg+3sing-4√13sin(g+a)-4,其中tana=2(7分)所以当sin(g+a)=-1时,dmx=4+√13242+√26(10分)2

书面表达(满分25分)One possible versionDear JohnThank you very much for your concern about my study during the epidemic. Im now conducting online learning atChina has postponed the start of the new school semester over safety concems as ysghts COVID-19ntbreak. Millions of Chinese students restricted to their homes have started online lrequired to open online curricula. Its purpose is to ensure that students are.guided study at home so thatstudents’ study won’ t be affectedDoes your country organize similar learningh项mm,mmmforward to your reply!Y

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