选修八 5.2《Unit 5　Listening》参考学习培训课件.ppt

新课标人教版课件系列高中英语选修选修(模块）模块）8-8-5.2Listening Task 1:P42The work on early people depends on the dates that are given to the bones found.If the dates are wrong,all the data about early people may also be wrong.So Zhou Heping is very interested to find out how archaeologists make sure their dates are accurate.1.Listen to the tape and fill the layers in the“waterpaper basket”diagram on the right.2.Listen to the tape again.Pay attention to the methods archaeologists use to date bones and how those methods work,then fill in the chart below.Yogurt potwasterpaperused envelopesOrange skinMethodHow it works1 Layers in the groundEach layer looks different as they are uncovered,so you can tell where one layer starts and another finishes.In the waste paper basket,the most recent layer is _,and older layer is below that and the _ is _.2 Radiocarbon datingAll living things have _ in their bodies.When they die,the carbon _ at a _ rate.The method measures _ of carbon in bones or plants using radioactivity and can _ how old the remains are.at the topoldestat the bottomcarbondisappearfixedthe amount ofwork outListening Task 2:P78The Terracotta Warriors are one of the greatest Chinese archaeological finds of the 20th century.Since their discovery in 1974 there has been a great deal of interest in their construction,function,and artistic value.Amanda Peters wants to find out more from her Chinese friend,the archaeologist,Zhou Lei,about how to preserve them.Main idea:_1.Why is the first problem easier to solve?2.A The solution is simple3.B Damp can be easily treated4.C If only occurs when it is hot5.D A new form of chemical protection has been invented2.How does the terracotta army show Emperor Qin Shihuangs power?A They are all the size of a man B They are a very impressive sight.C There are copies of 8,000 different men D Archaeologists think the army is a copy of Emperor Qin Shihuangs real army.3.What cause the Terracotta Warriors to lose their colour?A Sunlight and temperature changes B Damp and temperature changes C Damp and sunlight D All of the three4Why is it not easy to solve the problem of the forty kinds of mould?5 A They may need different cures6 B They cannot be removed7 C There are so many of them8 D They grew before the excavation。