2022英语周报八年级新目标，48期。答案

综上所迷,实数a的取值范围是22.[命题立意]考查参数方程,极坐标方程与普通方程的互化,极坐标的几何意义;考查逻辑推理,数学运算的核心素养[试题解析](1)∵曲线C的极坐标方程为p=12sin0+6√3cos6,即p2=12asin0+6√3ocos0,∴曲线C的直角坐标方程为x2+y2=12y+63x,即(x-3√3)2+(y-6)2=63,将直线l的参数方程化为普通方程为x-√3y+6√3=∴直线l的极坐标方程为pcs-√3psin0+63=0.(5分)(2)将日=3代入曲线C的极坐标方程得P=93∴A(9√3,),将=3代入直线L的极坐标方程得p=63,∴B(6,x),∴,|AB{=3√3(10分)

读后续写Possible version lI stared at the paper and then looked around. I was cold. Although I could not see my sistersnor the new house, which was hidden from my sight by a grey wall, I got the feeling that I was notalone. Walking along the shore was a tall familiar figure who looked lost in his thoughts. I lookedgain at the paper in my hand, closed my eyes and wishedAs /opened my eyes, I found my father was standing right beside me. Happy birthday, sonhe said, patting my shoulder gently. I smiled up at him and took his hand. Looking back, life fromthat day on marked the start of a close bond and a strong friendship with my father. What was mybirthday surprise? Wishes do come truePossible version 2I stared at the paper and then looked around. On the backside, there was a map. I noticed thatit was clearly leading me in a direction, but who could have sent this? I stood there in silence andstudied it. I decided to follow the map and it led me down the beach until I reached a staircase. Iooked back and could no longer see my siblings. I continued to follow the point on the map, untilI unexpectedly lost my footing and fell zksq down the stepsAs I opened my eyes, I found my father was standing right beside me. Happy birthday, sonhe said, patting my shoulder gently. Then he asked how I had come upon this place? I explained tohim that I had found the bottle in the ocean and when I opened it had the words on it. Shocked bythe message, my father realized what I had found I threw this bottle into the ocean many years agowhen I was alone. he said. I used to come to this exact place to get away from everyone else. NowI get to share this experience with you. What a birthday surprise

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