2022高二英语周报第9期答案

10.BD【解析】本題考查法拉第电磁感应定律,目的是考查学生的分析综合能力。金属杆PQ在进入磁场过程中做匀速运动,有 mosin0=IB,由法拉第电磁感应定律和闭合电路欧姆定律有E=BLv,Ⅰ2R解得儿童的速度υ-5m/s,选项A错误;设座椅释放时金属杆PQ距磁场上边界的距离为x,由机械能守恒定律有mgsn∥=、1mκ2,解得x=2.5m,选项B正确;考虑座椅从刚进入磁场到刚离开磁场的过程中,做匀速运动,动能不变,由能量守恒定律有Q-mg×2s·sinθ=80J,选项C错误、D正确。

书面表达One possible version:Last Saturday night, our school in Britain held a fantastic group birthday party for all foreign students inthe lecture hall, which left an unforgettable impression on usAll foreign students were free to take part in it. Some of our foreign friends were also invited. With thebaker's help, we made a huge birthday cake with delicious fruits and cream. Then some students danced, sangand shared funny jokes on the stage. Most impressively, a girl stood on the stage, with tears in her eyes, madea speech about our mother, the woman who gave birth to us with great pain, brought us to this beautiful worldand led us to enjoy love and learn knowlege. It is our mothers who are the greatest women in the world! Nowwe are far away from them, missing them. But we'll study hard and perform well to let them keep proud of us!What a moving birthday party it is!

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