高二英语周报2021-2022 36期答案

CD【解析】画出两个粒子的轨违如图所示,由几何关系得(a-n)2 d=2,解得r=2a-,C项正确;Q点的纵坐标b=-x=-C,A项正确;曲洛伦兹力提供向心力得叫B=型,可得q,由于粒子质量未知,所以不能求出带电粒子的电荷量,B项错误;根据以上分析可求出粒子运动轨道半径和粒子转过的圆心角,故根据周期T=可求得粒子运动时间=0T,D项正确,Vox xxx

第一节One possible versionDear Ms JenkinsI'm writing to ask you for help. Our school is going to sponsor an exhibition of Chinese paintings in theschool library next month. As president of the student council, i have been assigned the job of drafting an arnouncement in English as there aredreds of international students in our schoohave already written a rough draft of the above-mentioned announcement. But I'm afraid that there aresome mistakes in the English language. So I am hoping you would correct my possible mistakes in the announce-ment that i have attachedId appreciate it if you could do me the favocerely yourLIH

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