单击此处编辑母版标题样式,单击此处编辑母版文本样式,第二级,第三级,第四级,第五级,BOOK4,Unit7,(1),What is a gene?,Each cell in the human body contains about 25,000 to 35,000 genes,which carry information that determines your,traits,.Traits are characteristics you inherit from your parents;this means your parents pass some of their characteristics on to you through genes.For example,if both of your parents have green eyes,you might inherit the trait of green eyes from them.Or if your mom has freckles,you might inherit that trait,I.Related Information,and wind up with a freckled face.And genes arent just in humans,all,animals and plants have genes,too.Genes hang out all lined up on thread-like things called chromosomes.Chromosomes come in pairs,and there are hundreds,sometimes thousands,of genes in one chromosome.Together,all of the chromosomes and genes make up DNA,which is short for,deoxyribonucleic,acid,.,Chromosomes are found inside cells,the very small units that make up all living things.A cell is so tiny that you can only see it through the lens of a strong microscope,and there are,billions,of cells in your body.,Most cells have one,nucleus,.The nucleus,which is sort of egg-shaped,is like the brain of the cell.It tells every part of the cell what to do.How does the nucleus know so much?As tiny as it is,the nucleus has more information in it than the biggest dictionary youve ever seen.,In humans,a cell nucleus contains 46 individual chromosomes or 23 pairs of chromosomes(chromosomes come in pairs,remember?23 X 2=46).Half of these chromosomes come from oneparent and half come from the other parent.But not every living thing has 46 chromosomes inside of its cells.For instance,a fruit fly cell only has four chromosomes!,(2)Major genius fallacies,1.You must be born with a creative mind!,2.If you miss childhood,your genius is lost!,3.Do not memorize!,4.Proliferation of geniuses is a threat to humanity.,5.If you do something stupid,so are you!,6.Geniuses do not forget things!,7.Geniuses sleep little!,8.Early to ripe,early to rot!,9.You need a degree!,10.Genius can be evil!,11.Be unique!This boosts creativity!,12.TV makes you stupid!,13.Curiosity killed the cat!,(3)The most important factors for genius,1.Eliminate stress;,2.Sleep;,3.Self-discipline;,4.Learn day and night;,5.Abstract knowledge;,6.Knowledge representation;,7.Health;,8.Avoid negative emotions;,9.Optimism and patience;,10.Positive stimulation;,11.Clear goal;,12.Rational optimization;,13.Balance learning and productivity;,14.Ambition,motivation,energy and persistence;,15.Balance focus and generality;,16.Life philosophy:,measure the day,;,forget about money,;,Geniuss sole job and responsibility is,to create and contribute value;,17.Incremental reading;,18.Write down new ideas;,19.Brainstorming;,20.Time-management;,21.Study great people;,22.Study yourself;,23.Grow social skills;,24.Slug it out;,25.Warm family.,.Practical Writing,IOU,(,收据,),IOU means“I owe you”.IOU is a receipt and a written statement that proves one has borrowed something,especially money.What needs to be filled out may include the date,the time to pay back,the amount ofmoney,the interest,and the receivers signature.,Sample1(Term pay),May 25,2005,Six months after date I promise to pay to the Financial Office of Guangxi University the sum of,4,000 RMB Yuan for value received.,Wei Da,Sample 2(No term pay),March 15,2005,To the Financial Office of Guangxi University:,IOU 4,000 RMB Yuan only.,Yang Wei,March 8,2005,Borrowed from the phonetics laboratory,of Foreign Languages Department two Sony,cassette tapes.,Dong Hui,Sample 3(Borrowing objects),Your,Task,Write an IOU to certify that you borrowed,$5,000,from the Financial Department of Hui Huang Company on March 3,2005.The interest is 3%per month.You have to return the sum within seven months.,