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What the author tries to suggest may best be interpreted as___ [A]"It's no use crying over spilt milk" [B]"More haste,less speed" [C]"Look before you leap" [D]"He who laughs last laughs best" µÚ 3 Ò³ ¹² 13 Ò³ Text2 Well,nogainwithoutpain,theysay.Butwhataboutpainwithoutgain?Everywhereyougoin America,youheartalesofcorporaterevival.Whatishardertoestablishiswhethertheproductivity revolutionthatbusinessmenassumetheyarepresidingoverisforreal. Theofficialstatisticsaremildlydiscouraging.Theyshowthat,ifyoulumpmanufacturingand servicestogether,productivityhasgrownonaverageby1.2%since1987.Thatissomewhatfasterthan theaverageduringthepreviousdecade.Andsince1991,productivityhasincreasedbyabout2%ayear, whichismorethantwicethe1978-1987average.Thetroubleisthatpartoftherecentaccelerationis duetotheusualreboundthatoccursatthispointinabusinesscycle,andsoisnotconclusiveevidence ofarevivalintheunderlyingtrend.Thereis,asRobertRubin,thetreasurysecretary,says,a “disjunction”betweenthemassofbusinessanecdotethatpointstoaleapinproductivityandthe picturereflectedbythestatistics. Someofthiscanbeeasilyexplained.Newwaysoforganizingtheworkplace--allthat re-engineeringanddownsizing--areonlyonecontributiontotheoverallproductivityofaneconomy, whichisdrivenbymanyotherfactorssuchasjointinvestmentinequipmentandmachinery,new technology,andinvestmentineducationandtraining.Moreover,mostofthechangesthatcompanies makeareintendedtokeepthemprofitable,andthisneednotalwaysmeanincreasingproductivity: switchingtonewmarketsorimprovingqualitycanmatterjustasmuch. Twootherexplanationsaremorespeculative.First,someofthebusinessrestructuringofrecent yearsmayhavebeenineptlydone.Second,evenifitwaswelldone,itmayhavespreadmuchless widelythanpeoplesuppose. LeonardSchlesinger,aHarvardacademicandformerchiefexecutiveofAuBongPain,arapidly
The word "demographers"(Line 1,Paragraph 7)most probably means__ (  ) people in favor of the trend of democracy (  ) advocates of migration between states (  ) scientists engaged in the study of population (  ) conservatives clinging to old patterns of life µÚ9Ò³¹² 13 Ò³ 第10页共13页 Text5 Scatteredaroundtheglobearemorethan100smallregionsofisolatedvolcanicactivityknownto geologistsashotspots.Unlikemostoftheworld’svolcanoes,theyarenotalwaysfoundatthe boundariesofthegreatdriftingplatesthatmakeuptheearth’ssurface;onthecontrary,manyofthem liedeepintheinteriorofaplate.Mostofthehotspotsmoveonlyslowly,andinsomecasesthe movementoftheplatespastthemhaslefttrailsofdeadvolcanoes.Thehotspotsandtheirvolcanic trailsaremilestonesthatmarkthepassageoftheplates. Thattheplatesaremovingisnowbeyonddispute.AfricaandSouthAmerica,forexample,are movingawayfromeachotherasnewmaterialisinjectedintotheseafloorbetweenthem.The complementarycoastlinesandcertaingeologicalfeaturesthatseemtospantheoceanareremindersof wherethetwocontinentswereoncejoined.Therelativemotionoftheplatescarryingthesecontinents hasbeenconstructedindetail,butthemotionofoneplatewithrespecttoanothercannotreadilybe translatedintomotionwithrespecttotheearth’sinterior.Itisnotpossibletodeterminewhetherboth continentsaremovinginoppositedirectionsorwhetheronecontinentisstationaryandtheotheris driftingawayfromit.Hotspots,anchoredinthedeeperlayersoftheearth,providethemeasuring instrumentsneededtoresolvethequestion.Fromananalysisofthehot-spotpopulationitappearsthat theAfricanplateisstationaryandthatithasnotmovedduringthepast30millionyears. Thesignificanceofhotspotsisnotconfinedtotheirroleasaframeofreference.Itnowappears thattheyalsohaveanimportantinfluenceonthegeophysicalprocessesthatpropeltheplatesacross theglobe.Whenacontinentalplatecomestorestoverahotspot,thematerialrisingfromdeeperlayer 第11页共13页
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