必修五 1.1Unit 1 Great Scientist .ppt

新课标人教版课件系列,高中英语必修5-1.1,The 8th PeriodListening&reading(P44-P45),Listening Task(P44),Listening Task P44,Reading Task(P45)Finding The Solution,Puzzle,A,B,C,A,A,B,B,C,C,D,D,E,Can you go over it without missing any points or going over a line twice?,F,A,B,C,A,A,B,B,C,C,D,D,E,start,finish,F,A,B,C,A,A,B,B,C,C,D,D,E,Euler said,“If a figure has more than two odd points,you cannot go over it without lifting your pencil from the page or going over a line twice.”,A.B.C:even points,A.B:even pointsC.D:odd points,C.D.E.F:odd pointsA.B:even points,F,Leonhard Euler(1707-1783)Born:15 April 1707 in Basel,SwitzerlandDied:18 Sept 1783 in St Petersburg,Russia,Euler was a famous mathematician in the eighteenth century,he introduced a new branch of mathematics called topology.It is a form of geometry that help you understand things by turning them into diagrams.,Reading P45What is Euler path?,curved line,straight line,even point,odd point,A,B,C D:odd points,A,C:odd pointsB,D:even points,No Euler path,Has Euler path,start,finish,Fig 4:,A,1,2,3,4,Figure 4,