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22.解(1)因为[文]曲线C:p26,,[章]故pim+3sin[来] 0+3cos又x=[自]pcos0,y=p[知]即y2+3x2=6[嘛],即0y6(3分)[答]故曲线C的参数方程[案]为x=√2cos0[网](0为参数)(5分[文])4+t(2)依题[章]意,直线√3t,故[来]直线l:y=3(x[自]-4)即l:3x-[知]y-43=0,设曲[嘛]线C上的点P(2c[答]os0,6sin0[案]),则点P到的距离[网]d=16096m0[文]-412.(0+)[章]-4312(8分)[来]故所求距离的最小值[自]为310
参考范文JohnI[知] am delighted[嘛] to know you are intereste[答]d in tradition[案]al Chinese food.I would like to share relevant knowledge[网] with youChines[文]e people have varieties[章] of delicious[来] foods. On Dragon Boat Festivalp[自]eople eat ongzi which is wrapped with bamboo leaves and made of stickyric[知]e. Peking Duck is another popular food, consistin[嘛]g of juicy slices of ducked with pancakes and hoisin sauce. No doubt healthy eating is veryrtant[答] for us. We should eat more fresh vegetable[案]s and fruits. Besides, itongly recommend[网]ed that we should not eat wild animals, especiall[文]with viruses.W[章]e are scheduled[来] to have a Chinese Food Festival next month. Why nejoin us? Looking forward to your early replyYeLi[自] hua
