在“用打点计时器测速度”的实验中，打点计时器使用的交流电的频率为50Hz，某同学实验过程中打出的纸带如图所示，在纸带上选择0、1、2、3、4、5、6个计数点，相邻两计数点之间还有四个点未画出，纸带旁并排放着带有最小分度为毫米的刻度尺，零点跟“0”计数点对齐。根据图所示，计算打下计数点“2”时纸带的瞬时速度为___________m/s，从计数点“3”到计数点“5”的过程中，纸带的平均速度为___________m/s。
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| The most unforgettable thing during my long summer holiday last year, of course is my trip_1_ England.This was my first time to go abroad, so it really made me_2_. There were quite a lot of interesting_3_in England, such as Oxford.When we walked around Oxford, we saw quite a lot of ancient buildings on_4_sides of the streets.One of the most famous tourist_5_in Oxford is Christ (基督) Church, it's _6_one of Oxford University's 39 colleges.There is a huge hall in Christ Church, _7_was used as the dining hall at Hogwarts in the Harry Potter_8_. I felt really excited  when I heard this._9_place that impressed me_10_during my trip was a placecalled Stratford－upon－Avon.It was a small town.Maybe you haven't _11_it, but I'm sure you have heard about William Shakespeare-the great man's 12 . In Stratford－upon－Avon, I could 13 Shakespeare's Birthplace, Shakespeare Countryside Museum, The Royal Shakespeare Theatre, and a lot of places that are connected with 14 . I went to Shakespeare's Birthplace.It was the house 15 Shakespeare was born and 16 his early years. 17 sitting room, hallway (走廊), bedrooms, and kitchen were furnished (布置) in 16th －century 18 . I also went to see the Shakespeare Exhibition.It illustrated (展示, 说明) Shakespeare's life and career in both Stratford and London. I really enjoyed this nice trip to England, 19 I learnt a lot.I'm very happy that I could visit such an interesting 20 . I want to go there again in the future. | ||||
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