题目

From 16th to 27th March 2019 the ATOM Festival wants to show you that science is definitely for you. ATOM takes place in Abingdon, one of the UK’s “Science Capitals” sitting at the heart of British Science between Culham, Harwell and Oxford.ATOM 2019 begins with five leading scientists, engineers and educators taking up our “Three Million Dollar Challenge”— solving the big challenge of how to get more people into science and technology.As well as showcasing inspiring speakers — including BBC science presenter and mathematician Dr Hannah Fry — this year sees a broader range of f当1＜a＜2时，化简|a-1|+|a-3|= ．