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2022一2023学年度高三复习单元检测卷（二十）英语(考试时间90分钟，总分120分)第一部分阅读理解（共两节，满分40分）】第一节（共15小题；每小题2分，满分30分）阅读下列短文，从每题所给的A、B、C和D四个选项中，选出最佳选项。AOnline Event:What We Don't Know About GravityEventWhat we don't know about gravity31 March6 pm-7 pmVenueThursday3 1st March|6-7 pm BST|1-2 pm EST|and On-demand(按需随选)We are all familiar with the concept of gravity,from the force that keeps us firmly on the ground,to thephenomenon that explains the orbits of the planets in the Solar System and the whole structure of our Universe.But what exactly is gravity?Is it a force?In this talk,Professor Claudia de Rham will explore how much we actually know about gravity and howmuch more there is left to uncover.Claudia de Rham is a professor of theoretical physics at Imperial College London.With her group atImperial,she develops and tests new models to answer basic questions of physics,such as the origin andevolution of the Universe,its accelerated(expansion,and the nature of gravity.These developments havebeen recognized by multiple awards and prizes.·72·