WhenaSwedishshipthatsankin1628wasrecoveredfromtheportofStockholmhistoriansandscientistswereoverjoyedwiththechancetoexaminetheremainsofthepast.Theshipconstructionshowedhowshipswerebuiltandoperatedduringtheseventeenthcentury.Inthiswayartifactsobjectsmadebyhumanbeingsprovidedapictureofdailylifealmost400yearsago.
Underwaterarchaeology__thestudyofshipsaircraftandhumansettlementsthathavesunkunderlargebodiesofwaterisreallyaproductofthelast50years.Therapidgrowthofthisnewareaofstudyhasoccurredbecauseoftheinventionofbetterdivingequipment.BesidestheSwedishshipwreck(残骸)underwaterarchaeologistshavemademoreexcitingdiscoveriessuchasthe 5000-year-oldboatsintheMediterraneanSea.
Underwaterarchaeologycanprovidefactsaboutthepast.Inancientportsallovertheworldareshipssunkeninthepast6000years.Therearealsosunkensettlementsinseasandlakestellingofpeoplewayoflifeandtheirsystemsoftradeinancienttimes.Underwaterarchaeologistswanttostudytheseobjectstoaddtotheworld’sknowledgeofhistorybuttheyhavetofighttwoenemies.Oneenemyistreasurehunterswhodiveforancientartifactsthattheycanselltocollectors.Oncesoldtheseobjectsarelosttoexperts.Thesecondenemyisdredgingmachines(挖掘机)oftenusedtorepairports.Thesemachinesdestroywrecksandartifactsorburythemdeeperundersandandmud.Byteachingthepublicabouttheimportanceofunderwater“museums”ofthepastarchaeologistsarehopingtogetsupportforlawstoprotectunderwatertreasures.
1.WhatpurposedoesParagraph1serveinthepassage?
A.Toprovidebackgroundinformationofthetopic
B.Toattractreaders’attentiontothetopic
C.Touseanexampletosupportthetopic
D.Toofferbasicknowledgeofthetopic
2.Theaimofunderwaterarchaeologyisto .
A.exploitwaterbodies
B.searchforunderwaterlife
C.studyunderwaterartifacts
D.examineunderwaterenvironment
3.Underwaterarchaeologistsareworriedbecause_____.
A.seahuntershavebetterdivingequipment
B.theirknowledgeofworldhistoryislimited