2009高考英语复习课堂限时强化训练——阅读理解（二）（附详解）

《2009高考英语复习课堂限时强化训练——阅读理解（二）（附详解）》由会员上传分享，免费在线阅读，更多相关内容在行业资料-天天文库。

1、www.10gk.cn《十年高考网》2009高考英语复习课堂限时强化训练——阅读理解（二）1Today,ultrasonic(超声的)wavesarebeingputtoworkinlaboratoriesandfactories.Ifanultrasoundgeneratorisplacedinaliquid,thewavesmovetheliquidbackandforthhundredsofthousandsoftimeseachsecond.Thiscausesmaterialstomixquicklyortodisso

2、lve(使分解，使溶解)inliquids.Paintmanufacturers(制造商)useultrasoundtodoabetterjobofblendingcolors.Thecompaniesthatmakefilmforyourcamerafindthatmixingchemicalsbytheuseofsoundwaveswillproduceamoresensitivefilm.Thenewlightweight(轻量的)typeofwashingmachineusesultrasonicwavestogetcl

3、othesclean.Itsspecialultrasoundgeneratorisputintoapailofsoapywatercontainingthesoiledclothes.Thesoundwavesdrivethesoapywaterbackandforththroughtheclothsofastthateverythingissoonclean.Thereisalsoanewkindofdishwasherthatworksinmuchthesameway.Ultrasonicwavescanshakealiq

4、uidsofastthattinyholesformallthroughit.Theliquidisactuallytornapartbythisaction.Almostassoonastheseholesaremade,theyfalltogetheragain.Theresultisapowerfulpoundingaction.Inthedairyindustrythisisusedforthedoublepurposeofmakinghomogenized(使均匀，使匀质)milkandsterilizing(使无菌)

5、itatthesametime.Ifyoulookatsomerawmilkwithamicroscope,youfindthatitismadeupoflittledropsofbutterfatfloatingaroundinawateryliquid.Inordertomakemilkeasiertodigest,thesefatdroplets(微粒)maybebrokenupbyforcingthemilkthroughverysmallopenings.Theresultiscalledhomogenizedmilk

6、.Whentheultrasonicmethodisused,thesoundwavesnotonlybreakupthedropletsbutalsokillthegermsinthemilkbypoundingthemtopieces.(fromwww.nmet168.com)1.Whydoesapaintmanufactureruseultrasoundtodoabetterjobofblendingcolors?A.Becauseitischeaptouseultrasoundtoblendcolors.B.Becaus

7、ethewavesmovetheliquidsoquicklythatitcanmakematerialsmixquicklyordissolveinliquids.C.Becausetheycanmixchemicalsbytheuseofsoundwaves.D.Becausethewavescancleanthepaint.2.Whatpropertiesdoesultrasoundwavehave?A.Homogenizesandsterilizesthemilk.B.Mixmaterialsandbreakdrople

8、ts.C.Killgermsandsterilizemilk.D.Moveliquidsquickly.3.Whatexistsintherawmilk?十年高考试题、高考模拟试题、教学资源下载www.10gk.cn《十年高考网》A.Littledropsofb