2022高考综合英语周报答案

7.A【解析】由图乙可知原线圈电压的最大值为Un=502V,a=2x=100rrad/s,则原线圈接交变电压u的表达式u=50√2sin100x(V),A项正确;因原线圈的匝数比为2:1,所以副线圈两端电压的有效值为25V,电压表V2测的是滑动变阻器R2两端的电压,故电压表V2的示数小于25V,B项错误;若将滑动变阻器R2的滑动触头P向上滑动,则滑动变阻器R2接人电路的阻值减小,定值电阻R1的阻值不变,滑动变阻器R2分得的电压变小,电压表V2的示数减小,C项错误;电压表V1测的是原线圈的电压,也就是输入电压,所以将滑动变阻器R2的滑动触头P向下滑动对其示数无影响,D项错误。

二、读后续写范文(满分25分)Possible version 1Paragraph 1:It was time to put an end to the Magic Marty show. I walked over. "It was fishing line. " I sneeredfolding my arms. Marty subconsciously fingered the fishing line and nervously whispered, "So, are yougoing to tell people? Seeing the panic in his eyes, somehow, I hesitated. Should I_reveal the secret, Martymight lose his new_ friends. Finally, after struggling for a moment, I replied, "Nah, I won't say anythingMarty let out a relieved sigh, and I turned to walk awayParagraph 2Waitr"Marty jumped in front of me. Unexpectedly, he patted my arm, grinning. "You' ve got a prettygood eye for magic. Want to join me? "I nodded joy fully. That's how the Magic Marty and MysteriousMatt Lunch Show began. Now we've been a magic team for three months. And since I became a fellowmagician, Marty has let me in on some of his other tricks. It turns out that instead of a fake magician, Martyis a real friend.(150 words

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