2022100所名校高考模拟金典卷语文三答案

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19BC【解析】本题考查电场和图像的结合问题目的是考查学生的推理能力。由U=Ed可知,Er曲线下积表示电势差,则单位为伏特(V,选项A错误;设每单位体积绝缘球体中带的电荷量为q则球壳内距球心为r的位置的电场强度大小E=四但故m即球体内电场强度的大小与到球心的距高成正比选项B正确一带负电的点电荷衡球体越近电势越高电势能越小选项C正确由图像可知从球面到A点之间的任一点的电场强度都大于A、B两点间的任一点的电场强度则由U=Ed可知从球面到A点的电势差大于A、B两点间的电势差选项D错误。

第一节短文改错The moment I stepped into high school. I have madeup my mind to study hard in order to enter the gooduniversity. In the first vear. I made a lot of new friendsall of who were excellent. But my scores went up orwhomanddown, which made ne feel stressful. My teacher toldstressedmyself that I needed relaxation. She recommended meNmelisten to music and take more activity. With her helpactivitiesgradual recovered my confidence andmade mucgraaduallyprogress than before. Finally, I was admitted to my idealuniversity