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产品项目是指产品线中不同的品种、规格、品牌、价格的特定产品，例如：某商店经营的服装系列、食品系列、化妆品系列等。
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相同的产品种类，其产品生命周期曲线的形态亦相同。
All mammals(哺乳动物) need sleep.But the amount of sleep they need is different.Children need 1 (many) sleep than grownups.A new born baby sleeps 17 to 18 hours a day.Grownups need between 6 and 9 hours of sleep a night.Though 2(science) do not know for sure why you sleep,they do have some ideas.Safety could be 3 most important reason for sleep.People and other animals might sleep because it keeps them safe at night.Things go wrong if you do not get enough sleep.4 is hard to think and work unless you get plenty 5 sleep.In the past twenty years,people 6(learn) a lot about what happens when you lie down to sleep.Sometimes your eyeballs move back and forth very fast.This kind of sleep is called REM, 7means rapid eye movement.One 8(interest) fact about this kind of sleep is that dreaming occurs during REM.If you have trouble 9(fall) asleep,there is an old suggestion that you breathe very 10 (slow).Others believe that drinking warm milk will help make you drowsy.
Lucy is the most creative person I know.At school,she 1(create) many interesting projects and won some prizes,so her parents were very 2(pride) of her.Now Lucy works as a 3(write) for a TV show.Together with her colleagues,she has to think of fresh ideas and come up with 4(fun) dialogues for the actors on their show.It is not 5 easy job,but Lucy does it 6(proper).Lucy is very curious.She likes to travel and meet new people 7 have their own opinions that are different 8 hers.She often keeps a notebook in 9(she) bag and writes down what she sees and hears.I always enjoy 10(talk) with her.
Direction:TranslatethefollowingpassageintoChinese.DifferentcultureshavedifferentwaystocelebratetheNewYear.Manyculturescelebratewithspecialdishesandobjects.InChina,peoplecelebratethelunarNewYear,ortheSpringFestival.Theypreparetraditionalfoostosharewithfriendsandfamily.Inthenorth,peopleusuallyeatjiaozi,ordumpling.Itismadeofflourwithdifferentfillings.Themostpopularfillingsareporkandcabbage,beefandcelery,andmuttonandcarrot.Inthesouth,peoplefavorastickysweetricepuddingcalledNiangao.Itismadeofricewithwalnut,pinenut,seasame,andbeanpastefillings.TheChineealsotraditionallycelebratethelunarNewYearwithfireworks.TheyfirstusedthemasearlyastheeighthcenturyA.D.Fireworksaremadeofmaterialslikesulfur,charcoal,andsaltpeter(alsoknownaspotassiumnitrate).InScotland,thecelebrationfortheNewYeariscalledHogmanay.Thisiscelebratedinpartiesinhomesandonthestreetwithmusic,dancing,andsinging.Manymenwearkiltswhicharemadeofwool.Thereareusuallyfireworksatmidnight.Whenmidnightarrives,everyoneholdshandsandsingsatraditionalsong.Theneveryonekisses.Traditionally,ifatalldarkpersonarrivesatahousejustaftermidnightwithapieceofcoal,thiswillbringgoodlucktothehouse.Somanypeoplevisittheirfriendswithpiecesofcoal.Theyalsobringgiftsofwhiskeyandblackbuns.Thesearespecialcakesmadeofdriedfruitandflour.
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