英语周报2021-2022高考版30期答案

第三节One possible versionParagraph 1He said his belowed wife partially lost her eyesightbecause of diabetes and she was no longer able to apply hermake-up. Fearing being laughed at, she locked herself inher room, abandoning herself to great grief. She was abso-lutely beautiful even without make-up. But what upset herwas that she simply felt not comfortable leaving the homewithout make-up. Sensing her loneliness in a colorlessworld, he was also at a loss as to what to do. Onceinformed of this class, he determined to learn make-upwithout hesitation, hoping to make a differenceParagraph 2So he decided to take the course to surprise his wifeWithout a pause, he shared his story. He mastered a widerange of practical skills, allowing him to help her take on anew look. Surely, being enveloped by an atmosphere oflove, his beloved wife at present was deeply affected."Inot only want to learn how to apply her make-up, I wanther to wear the most beautiful make-up so her inner beautalso shines on the outside. " He announced. "It is hersmile that touches most my heart, not the make-u

18.BD【解析】根据公式22-1)×a=n,可知该DNA分子中含有n/2个腺嘌呤脱氧核苷酸,根据DNA分氵子中A=T,可知该DNA片段中含有胸腺嘧啶脱氧核糖核苷酸为0.5n个;第3次循环中消耗了23-10.5n=2n个腺嘌呤脱氧核苷酸;次循环中共消氵耗了(21-1)×0.5n=7.5n个腺嘌呤脱氧核萁酸;4宁次循环后得到的DNA分子为16个,每个】NA分子含有2个游离的磷酸基团故4次循环后得到的DNA分子共有游离的磷酸基团32个。故选。w

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