20222020届名校学术联盟押题卷文综七答案

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第二节书面表达Dear LiOn behalf of the Students'Union of our school, I'm writing to express ourheartfelt thanks for your wonderful speech on AIWe Chinese have a saying that listening to your words for an hour is morebeneficial than reading for ten years. We have learned a lot from your speechindeed. Having heard your speech, we not only gain a better understanding ofwhat AI is, but we're also aware of what effects it might have on us humanbeings. We do hope you'll come to our school to deliver more brilliant speechesin the near futureThanks again!Yours sincerelyLi Hu

20(答暴⑩BD考什么Q命题人考查法拉第电磁感应定律、右手定则、功能关系等知识,旨在考查考生的分析综合能力这么考根据右手定则可知,导体圆环进入磁场过程中感应电流的方向为逆时针,A项错误;导体圆环进入磁场过程中的平均感应电动势E=n4φ结合q=IAt可得,导体圆环全部进人磁场过程中通过导ETTB体某截面的电量为q=RRB项正确;导体圆环一半进入磁场时其加速度为0,此时有F=BI,解得IBL 2BI因此导体园环半进入磁场时的电功率为P=PR=B7,C项错误;根据功能关系可知,导体圆环从初始位置到全部进入磁场过程中产生的热量为Q=2FrD项正确