2010年职称英语考试（理工类）完型填空解新增文章

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1、更多精品百校通论坛www.baixiaotong.cn2010年职称英语考试（理工类）完型填空解新增文章-书中第3篇第3篇 SeeingRedMeansDangerAheadThecolorredoftenmeansdanger-andbypayingattention, （1 ）canbeprevented.Atrailroadcrossings,flashingredfightswarncarstostayback.Aredlightatatrafficintersectiontellscarstosto

2、p,so （2） don'trunintoothercars.Inthefuture,thecolorredalsomayhelppreventdanger （3） constructionsites.Thanksto1 newworkbyengineers,bridgesupports2-orotherkindsofmaterials-couldonedaycontainacolor-changingmaterial.Itwillturnred （4） astructurecollapsesorfalls 

3、（5） .Atinymoleculemaymakeabigdifferenceinfuturewarningsystems.Apolymer （6） acolor-changingmoleculecalledamechanophoreturnsredsecondsbeforeitsnaps3.Thetechnologymayonedayallowdamagetomaterialsorstructures4tobeeasily （7） .Thesecretbehindthecolor-changingmater

4、ialisaparticulartypeofmolecule.Amoleculeisagroupofatomsheldtogetherby （8) bonds.Moleculescomeinallshapesandsizes,andmakeup （9  ） youcansee,touchorfeel.Howamoleculebehavesdependsonwhatkindsofatomsitcontains,andhowthey'reheldtogether.Whenapolymercontainingaco

5、lor-changingmoleculecalledamechanophoreisabouttobreaks,itproducesacolor.Whenapolymerwithmechanophoremoleculesbecomes"injured"or  （  10  ） ,oneofthemechanophorebondsbreaksandthematerialturnsred."It'sareallysimpledetectionmethod,"saysNancySottos,oneofthescien

6、tistswhoworkedontheproject."We're （ 11 ） upthisonebond,anditchangescolor."Sottosandherteamtestedthecolor-changingpolymersintheirlab.Thetest （ 12 ） provedencouraging.Thereisawaytogetridof~theredcolor: （ 13 ） .Whenabrightlightisshoneonthemechanophore,thebroke

7、nbondisfixedrnandtheredcolordisappears.This"self-healing"maybeaproblemforengineers.Theyneedtousethecolor-changerinbigconstructionprojectsthatwillbe （ 14 ） ,insunlight.Andsunlightwillmakethemechanophore'swarningsystemuseless.Sottosandherfellowscientistsstill

8、have （ 15 ） worktodobeforethecolor-changingmoleculescan.beusedoutsidethelab.更多精品百校通论坛www.baixiaotong.cn词汇：crossingn.十字路口 mechanophoren.机械响应性聚合物 intersectionn.交叉路口moleculen.分子 snapv.折断，断裂 polymern.聚合物 a