2022高一英语周报外研28期答案

19.A【解析】核酸分为DNA和RNA,DNA主要在细胞核、RNA主要在细胞质,细胞核和细胞质均有很多种类的蛋白质,A错误;核酸是生物的遗传物质,蛋白质是生命活动的主要承担者,B正确;核酸的合成需要某些种类的蛋白质(酶)参与,蛋白质的合成需要以核酸为模板,C、D正确。

【参考范文】The little boy headed back down to the old man's house. The thought of knocking at the oldman's door filled the little boy with fear, but he still knocked on the door, waiting breathlesslyFinally, it opened, and out came the old man. Seeing the boy holding a well-wrapped dog figurinehe looked very astonished but still glared at him without a word Determined to break the ice. theboy gave the old man the gift with a precious card attached, expressing sincerely caring about himDeeply moved by all the boy did, the old man could say nothing but to hug him tightly, with tears ofappreciation welling up. Out of gratitude, he bought a magazine from the boyFrom that day on something changed inside the old man. He adopted a real live dog and treatedhim as his child. It seemed that it was the company of the dog that led the lonely soul out ofdarkness and loneliness. Gradually, he was willing to greet others with a bright smile, expressinghis appreciation to life. Indeed, only when we open up the door of our heart can we be bathed inthe brilliant sunshine and enjoy the warmth of love and care

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