英语周报外研版2022-2022年答案

17考向预测…分析近几年全国各地高考试卷,交变电流和变压器属于高频考点,预测2021年高考试卷仍会对该考点进行考查。解思路……R1=BR2,又由于n=l2n22,C项错误;电源的输出电压为U=36n2,整理得2=136V,U=U1+1R,U2=I2R2,又U=n=2,联立解得U1=18Vh2=1.8A,即电压表的示数为18V,电流表的示数为18A,A项错误,B项正确;通过原线圈的电流为1=2l2=3.6A,电源的输出功率为P=1U129.6W,D项错误。參考答案……B

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

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