2022－2820英语周报HZ27期答案

一缺乏话句间的连接成分,内容不连贯。信息未能传达给读者。0分未能传达给读者任何信息:内容太少,无法评判:写的内容均与所要求内容无关或所写内容无法看清。(yy) One Possible VersionDear PeterLearning that you want to know the National College Entrance Examination(NCEE)in ourprovince, I'm writing to tell you about it.NCEE is the biggest examination in China, which means a great deal to every Chinesestudent. On one hand, it is the only way to attend a college. On the other hand, it determineswhat job one can obtain in the future. Generally speaking, it usually takes place on 7-8 Juneevery year. Chinese, maths and foreign languages are the required exam subjects. The studentsof arts and science can choose other three subjects according to their willFor me, Peking University is my favorite university, which is the ideal university for mostChinese students

14.【解析】由带电粒子在磁场中运动的偏转角可知带电粒子运动轨迹所对的圆心角为60°,因此由几何关系得磁场宽度L=Rsin60(1分)未加磁场时有L=tt1分)由洛伦兹力提供向心力可得B=m饕(1分)sin 60联立可得比荷m=,B(2分带电粒子在磁场中运动的周期TZxtb sin 604√3x(3分)3

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