英语周报高一外研综合第40期答案

22【解析】(1)点P的直角坐标为(0,2),所以点P的极坐标为(2,),……………………1分曲线C的普通方程为(x-1)2+(y-1)2=1,即+y2-2x-2y+1=02分所以曲线C的极坐标方程为p2-2p(sin0+cos)分5(2)将0=a代入p2-2p(sin0+cos)+1=0得2-2p(sin+co)+1=0(0 0成立,设点A,B,M对应的极径分别为p1p·p,所以p25分p2所以p=P=sina+cosa,所以三角形OPM的面积1OM|·OP=+×(sina+cosa)×2×cosa= Sina cosa+cos2a6分sin2a+1+cosa=1+o(sin2a+cosa)2 sIn(2a+i)8分因为0

B语篇解读:主題:人与自然话題:清洁海滩。本文是一篇记叙文。文章介紹了一位印度少年自发清洁海滩,倡导人们保护海洋和周围环境的志愿行动34.解析:词义猜测題。根据第二段第一句”.., the clean beach leaving a great impression on me."可知,洁净的巴厘海滩给马尔哈留下了深剡的印象,与画线诃鉏所在句之间弃在转折关系;且由后一句“was complaining about how bad our beaches are compared to beaches in Bali”可推知,画线词鉏与bad同义,与 clear相反,故画线词与B项“凌乱的”词义相近答案:B35.解析:加节理解题。根据第二段中的“.. since then cleaning the garhage on the beach has become aweekend routine. Currently, there are 25 odd volunteers spending our weekends cleaning the beach. 9知,马尔哈自愿去清现海滩。答案:C26.解析:推理判断題。根据最后一段的" t order to make a sustainable differerce, they must make peoplenders; and that they have to stop dunging garbage into any source."可知,提高人们保护海洋的意识是当务之急答案:C27.解析:摊理判断題。文章介绍了一位印度少年自发清洁海滩,偈议人们保护海洋和周围环境的志愿行动。根据第一段中的“ they have a differen: t:ISsIon- cleaning the Datar Beach"和最后一段中的“ I hopeeople realize it' s their duty to keep their surroundings as well as the ocean clean”等细节可以看出马尔哈很有責任心, sympathetic“有同情心的”; considerate“体贴的,考虑周到的”; huigong“爱交际的,外向的”; responsible“有责任心的,负责的”答案:D

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