2022高二英语周报外研版第27期答案

13.解:(1)由题意知,直线l的直角坐标方程为2x-y由题意知曲线C的直角坐标方程为()+√3(2)cos p,∴曲线C2的参数方程为(q为参数)y=2sin(4分)(2)设P(3cosg,2sing),则点P到直线L的距离d= 12y3 cos"6当sin(-g)=-1时,即点P的坐标为P2,1)时,点P到直线L的距离最大,此时dnax=2√5(10分)

第三节书面表达wersionDear Sir or MadamMy name is Li Hua. As an exchange student fromChina, I am studying in a local school. I am reallydelighted to learn that a volunteer for your Chinese culturallic exhibition is required and I'm confident that I amtruly fit for thestart with, my advantage first lies in the fact that IChina and used to beand quite familiar with Chinese relics. Further-more, being an outgoing and optimistic boy, I am good atcommunicating with others and introducing Chinese cultureto the world is always my honor and my pleasure. Finallythere is no problem with my spoken English, as I havelived here for almost a year and I have no difficulty commu-dicating with others in EnglishI would really appreciate it if you can offer me thechance to be a volunteer in your museum. I am looking forward to your early reply.Li Hua

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