2018-2022八年级外研版英语周报答案

书面表达One possible versionDear PeterI'm writing to invite you to see the Chinese Painting Exhibition to be held in our city.The exhibition will start at 8: 30 am on Saturday and last till 5: 00 pm on Sunday in the city museum It'ssaid that a large number of Chinese paintings, some of which are original works by famous painters like ZhangDaqian and Qi Baishi, will be on display. Besides, there will be various souvenirs to be sold. I know you re veryinterested in traditional Chinese culture, so I can t wait to tell you the news and hope we can go together.Looking forward to your reply.You

所求实数a的取值范围是[一1,+⊙).…12分22.解:(1)据题设知,圆C的普通方程为(x-1)2+y2=4,…1分即圆C的普通方程为x2+y2-2x-3=0.…………………………2分所以圆C的极坐标方程为p2-2∞00-3=0.………………………………………4分(2)直线的普通方程为x-y-3=05分3=0x=3(x-1)2+y2=4.y=-2非主7分y故有点A(1,-2),B(3,0)或A(3,0),B(1,-2).……………………………8分又知点P(2,-1),所以PA|+|PB|=√(2-1)+(-1+2)+√(2-3)2+(0322210分

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