DNA-the story of you.ppt

lesson 29 DNA-the story of you Lead-in What do you know about DNA? What can scientists do with DNA? DNA-the story of you DNA-the story of you Vocabulary language points a) in general 大体上，一般而言，概括来说（通常置于句首） 也相当于generally speaking . eg: In general/ Generally speaking, winter is far more cold than summer. b). But building a living thing is far more comples than building a house. far 用来修饰形容词和副词的比较级，这样的词语还有much，still, even, no, a little, a bit, a lot, rather, any等。 eg: The room is a bit larger than that one. He works still harder than ever. This train runs much faster than that one. language points c) except for 除了... 之外；要不是由于（要求排除的是不同类的,是对整体的肯定，对部分的否定） eg:Except for one old lady, the bus was empty. She would have left her husband years ago except for the children. except 除...之外（要求排除的是同类，出去的部分不包括在整体之内，一般不用于句首） eg: We all went to the zoo except David. besides 除...之外，尚有...，（除去的部分包括在整体内） eg: He also knows English besides Chinese. language points d) From your DNA, scientists can identify not only you, but also people who are related to you. relate to/ with “ 与...有关，使...互相关联，与...有亲戚关系 eg: He is related to my family. The matter relates to him. e) Your DNA has billions of instructions that (定从)explain why(原因状从) you are the way(that)(定从) you are. Homework Finish the two exercise books. * * * The Reading Vocabulary Its full name is Deoxyribonucleic acid [di:?ksi,raib?unju:kli:ik] [?s?d]. It means 脱氧核糖核酸“in Chinese. Scientists use it to help doctors do paternity test(亲子鉴定），help polices find out the criminals（罪犯）, etc. blueprint complex Except for twins copies repeats identify are related to granddaughter billions of blueprint [blu:print] n. 蓝图 general [d?en?r?] adj. 一般的，普遍的 complex [k?mpleks] adj. 复杂的 twin [twin] n. 双胞胎之一，孪生儿之一 repeat [ripi:t] v. 重复，复述，背诵 pattern [p?t(?)n] n. 模式，形式 identify [aidentifai] v. 确认，鉴别 grandson [gr?n(d)s?n] n. 孙子，外孙 granddaughter [gr