英语周报外研版高二20期答案

第二节读后续写( One possible version)Finally, the day came. Anxious but excited, I spent the whole day cleaning the house andpreparing the food. With everything ready, all guests arrived one by one. within the next hourand a half, I had six complete strangers laughing, eating, and drinking at my apartment. Musicwas playing, the conversation was flowing, and new friendships were being formed. It wasincredible. One of the people, whom I messaged on Instagram, told me this was one of the mostfun New York City experiences he'd ever had. All enveloped in a curtain of darkness, it was timeto say goodbyeWhen everyone had left, I sat down and processed what had just happened. I couldn,'tbelieve that 48 hours before I didnt know any of these people, and now we were all laughing andtalking like we'd always been friends. It was a really enjoyable and unforgettable experience forme. It also made me realize that doing something kind for strangers isnt awkward butmeaningful. Whether it's paying it forward with a cup of coffee or simply smiling at a stranger,random acts of kindness do make the world a little better (173 words)

8.D【解析】根据题意可知,A、B两球的质量相等,均设为m,剪断细绳L2瞬间,对A受力分析,如图1所示,由于细绳L1的拉力突变,沿细绳L1方向和垂直于细绳L1方向进行力的分解得:Fr= mgcos,ma1= n gsin。剪断细绳L2瞬间,对B进行受力分析,如图2所示,由于弹簧的弹力不发生突变,则弹簧的弹力还保持不变,有:Fcos=mg,ma2= mgtan6,所以Fr:F=cos2:1,a1:a2=cos日:1,故D正确

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