作文范文Dear peterI'm Li Hua. I have some good news to tell you that our city museum will hold a specialexhibition to make the chinese traditional folk cultures well known. so i'm writing to inviteyou to visit it with meNow I will give you a detailed description of the exhibition. It will start from April 6 andend on May 6. There will be a total of 1,000 items to be showed at the exhibition and many ofthem are traditional Chinese festival decorations such as Spring Festival couplets and lanternsThe exhibition will not only present us with antique collections, but will also allow theaudience to involve themselves in the cultural atmosphere of ancient China. Lets decide onthe date if you're freeLooking forward to your reply

9.向预测…分析近几年全国各地高考试卷,考查天体运动属于高频考点,也是高考热点,题型多为选择题,预测2021年仍会对这一考点进行考查。够國思路……设地球和月球的质量分别为M1、M2,地球和月球的半径分别为R1、R2。在星球表面,万有引力等于重力,有GMmR8Rmg,联立解得g=B,C项正确;在星球表面,万有引力提供向心力,有GR=mR、Rx=mR2,联立解得=√,D项正确;由以上信息无法求得月球的质量和密度,也无法求得月球绕地球运行的周期,A、B项错误。参考答案……CD命题人讲评命制过程】本题以嫦娥五号探测器成功发射为情景进行命制,考查了宇宙速度及万有引力定律的应用,同时对考生的建模能力、推理论证能力等进行了考查。【得分锦囊】在星球表面有GR2=mg=mR【规律总结】解决天体问题的关键主要有两点:(1)万有引力提供向心力、即Gr2=m=mo2=m(2Fy)(2)在地面附近万有引力近似等于重力,即GMm=mg

以上就是2022英语周报八年级上册。第一次答案，更多英语周报答案请关注本网站。

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