黄冈八模2022模拟测试卷答案

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22.解(1)因为曲线C:p26,,故pim+3sin 0+3cos又x=pcos0,y=p即y2+3x2=6,即0y6(3分)故曲线C的参数方程为x=√2cos0(0为参数)(5分)4+t(2)依题意,直线√3t,故直线l:y=3(x-4)即l:3x-y-43=0,设曲线C上的点P(2cos0,6sin0),则点P到的距离d=16096m0-412.(0+)-4312(8分)故所求距离的最小值为310

参考范文JohnI am delighted to know you are interested in traditional Chinese food.I would like to share relevant knowledge with youChinese people have varieties of delicious foods. On Dragon Boat Festivalpeople eat ongzi which is wrapped with bamboo leaves and made of stickyrice. Peking Duck is another popular food, consisting of juicy slices of ducked with pancakes and hoisin sauce. No doubt healthy eating is veryrtant for us. We should eat more fresh vegetables and fruits. Besides, itongly recommended that we should not eat wild animals, especiallwith viruses.We are scheduled to have a Chinese Food Festival next month. Why nejoin us? Looking forward to your early replyYeLi hua