2.C设复数z=x+y(x,y∈R),由题意可得|x+(y+1)il=1,则x2+(y+1)2=1,故复数z在复平面内的点的轨迹为圆

Dear Sir/MadamMy name is Li Hua. And I'm writing to apply to be avolunteer for our international community. Now let megive a bit more information about myself.I'm a boy of 18 from a high school. My spokenEnglish is so good that I often get prizes in differentspeech contests, ensuring me to communicate withforeigners fluently. What's more, I'mi especially out-going, familiar with our neighborhood as well as our city,good at communication and always glad to help others. I'mwilling to provide the best service for every foreignerour community. Therefore, I think I'm suitable for servingthe ncighborhoodI would appreciatc it if you could offer me the chanceto be a volunteer. Thank you!Yours faithfully.Li Hua

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