2022英语周报八年级下册NP答案

书面表达One possible version:Dear TomThe novel coronavirus epidemic is raging around the world. In order to cheer for the people of the world, we are goingto sing a song to fight against the epidemic. Many students fall in love with the song Fight the virus, so we decide to singthis one together.As you are fond of singing, we sincerely invite you to sing with us. Before performing it, we need to practice everySo if you are free, please join us in the school hall at 6 o'clock in the evening from Monday to Friday this weekWe are looking forward to your participation.Yours

14.x y=0【解析】/(x)=x-cosx x(1 sinx),则切线的斜率为f(0)=-1,又f(0)=0,故所求切线方程为y-0=-(x-0),即x y=0

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