英语周报 2018-2022 高二 HZ 2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

2.C【解析】由诱导公式和二倍角的正弦公式得ysin x+sin(x+〕]1=(sin x+cos x)2-1=2 sIn rcos x=sin2x,因此,该函数的最小正周期为=,且该函数为奇函数,故选C.

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