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教育部审定 2013 义务教育教科书 sh 英语 Unit 5 (衔接三年级起点) 九年级 Look into Science Lesson 29 It's fun! It's easy! To understand the meaning and usage of the new words and expressions. To know more about DNA. To learn more about human beings and enjoy science. Free talk Does Cindy look like her father? Do you know what makes it? What do you know about DNA? What can scientists do with DNA? Presentation New words pattern n. 模式;形式 identify V. 确认;鉴别 related adj. 有关的:相关的 grandson n. 孙子:外孙 granddaughter n. 孙女:外孙女 instruction n. 指示;说明 New words DNA 脱氧核糖核酸 blueprint n. 蓝图 general adj. 一般的:普遍的 complex adj. 复杂的 twin n. 双胞胎之一 repeat V. 重复:复述;背诵 Practice Number the words: Can you remember? DNA blueprint repeat identify general twin pattern grandson 6 4 related complex instruction granddaughter 2了 12 Reading task Listen to the text and fill in the blanks: 1.Generally speaking,a blueprint is a drawing. 2. Except for identical twins,each living thing has its own unique DNA. 3.Our DNA come from our parents 4.A person's DNA is in every part of his or her body Read the text and judge the sentences: 1.DNA is the pattern our body uses to build itself. (T) 2.Each living thing has it's own unique DNA. (T) 3.From your DNA,scientists can identify you and people related to you. ()T 4.Our bones do not have the same DNA as our skin.F 5.Building a house is far more complex than building a living thing. ()F Do they have the same DNA?Please judge according to the text. 1.1 my twin brother 2.1 my grandparent 3.my hair my blood 4.1 my brother's skin 5.my mother my sister 6.my father my mother