2022七年级下册英语周报30答案

短文改错This evening my father was at a grocery store, where is often crowded. A woman next to with him hadwhiclocked her keys and her baby in her vehicle. Several store clerks had tried to help her but in vain, and he did notshehave the money for a tow truck(E4). My father called a friend of his who is the tow truck driver. It wasalate in the evening and he were having dinner with his family. Therefore, he immediately agreed a drive to helpwasHowevertothe woman. My father then gave the driver twenty dollars and all ended good. The woman was quite moving andwemovednearly burst into teartears

解析:諴数分裂过程中,四分体时期同源染色体上非姐妹染色单体之间的交叉互换和减数第一次分裂后期非同源染色体的自由组合都会增加配子的多样性。故选D

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