2022英语周报高考3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

9.B【解析】在探究pH对酶活性的影响实验中,自变量是不同pH,A项错误;淀粉酶能将淀粉分解,不能将蔗糖分解,利用斐林试剂检测生成物可以达到目的,B项正确;根据酶的专一性,蛋白酶可以将蛋白块分解,但蛋白酶的化学本质是蛋白质,能够与双缩脲试剂发生紫色反应,C项错误;在高温、过酸、过碱的条件下,酶的空间结构遭到破坏,导致酶失活,因此加氯化铁的一组气泡较多D项错误

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