2022 英语周报 课标 27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)

27.【答案】C解析:沃森和克里克以威尔金森和其同事富兰克林提供的DNA衍射图谱的有关数据为基础,推算出DNA分子呈螺旋结构,未使用放射性同位素示踪技术,A不符合。摩尔根閉队采用假说演绎法,利用果蝇最终证明了基因在染色体上,B不符合。噬菌体侵染细菌的实验分别用P和3S标记亲代噬菌体的DNA和蛋白质,证明DNA是遗传物质,C正确。萨顿采用类比推理法硏究蝗虫精子和卵细胞形成过程提出基因在染色体上的假说,D不符合。故选C

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