Ifyourpenbrokeatschooltoday，whatwouldyoudo？Youwouldgotoashopandbuyanewone．Whatifyoucouldsimplyprintoutareal，workingpenwithyour3-Dprinterwithoutleavingyourroom？

Tenyearsagopeoplecouldonlysee3-Dprintinginsciencefictionmovies．Butnow3-Dprintingishereandit'sbringingbigchanges．

Unlikenormalprintingthatcanonlycopya2-Dpicturewithink.3-Dprintingcanbuildalmostanythingmadefrommaterial．Theprinterlayers（分层）thematerialindifferentshapestocreatetheobjectyouwanttobecopied．

The3-Dprinterhasbeenusedtomakemanydifferentthings．Peoplehavemadecupscarsandevenanairplanewithit．

Doctorshavebeenusing3-Dprintersforseveralyears．People'snervoussystemshavebeenprintedoutin3-Dformmedicalresearch．Somebodypartshavebeenprintedandusedinhospital．Severalmonthsago，doctorsuseda3-Dprintertorebuildthefaceofapersonwhohadabadaccident．Inthefuture，itisexpectedthattheprinterwillmakehumanorganstosavemorelives．

Howevertherearedrawbackstotheprinter．Atthemoment，printingcanbequiteslowandit'sstillratherexpensive．Theaverage（平均的）priceofahouseholdprinterisaround$1，700，notincludingthecostofthematerials．

Butasthetechnologydevelops，itshouldn'tbelongbeforedisadvantagesareimproved．Onlytimewilltellwherethisnewtechnologywilltakeus．

61．Peoplecouldsee3-Dprintingin___tenyearsago．

A．largehighschool

B．sciencefictionmovies

C．digitalcamerashop

62．Peoplestillcan'tmakea（n）___witha3-Dprintersofar

A．airplane

B．face

C．organ

63．Whatdoestheunderlinedword"drawbacks"mean？___

A．不足

B．趋势

C．优点

64．WhichofthefollowingisTRUE？___

A．Thenormalprintercanbuild3-Dobjectsyoumant．

B．Nonervoussystemsareprintedoutin3-Dform．

C．The3-Dprintingcanbecheaperandfasterinthefuture

65．What'sthebesttitleofthepassage？___

A．Thedisadvantagesof3-Dprinting

B．thechangesbroughtby3-Dprinting

C．Therapiddevelopmentofscience．