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

8.AC解析:本题考查原子的跃迁。根据题意,发生受激辐射时,辐射的光子能量等于原子的两个能级的能量差,也等于入射光的光子能量,故入射光的光子能量等于原子的两个能级的能量差,A项正确;发生受激射时,辐射的能量由原子提供,故原子的总能量减小,原子的电势能减小,但电子动能增大,故C项正确,B、D项错误。

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