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1、SSAT备考：SSAT阅读基础练习题SSAT阅读考试是许多同学迫切希望提高的部分，以下是我们为大家准备的SSAT基础阅读练习题，希望对同学们的SSAT阅读日常备考有所帮助。 Manygreatinventionsaregreetedwithridiculeanddisbelief.Theinventionoftheairplanewasnoexception.AlthoughmanypeoplewhoheardaboutthefirstpoweredflightonDecember17,1903,wereexcitedandimpressed,o
2、thersreactedwithpealsoflaughter.Theideaofflyinganaircraftwasrepulsivetosomepeople.SuchpeoplecalledWilburandOrvilleWright,theinventorsofthefirstflyingmachine,impulsivefools.Negativereactions,however,didnotstoptheWrights.Impelledbytheirdesiretosucceed,theycontinuedtheirexperimen
3、tsinaviation.OrvilleandWilburWrighthadalwayshadacompellinginterestinaeronauticsandmechanics.Asyoungboystheyearnedmoneybymakingandsellingkitesandmechanicaltoys.Later,theydesignedanewspaper-foldingmachine,builtaprintingpress,andoperatedabicycle-repairshop.In1896,whentheyreadabou
4、tthedeathofOttoLilienthal,thebrother′sinterestinflightgrewintoacompulsion.Lilienthal,apioneerinhang-gliding,hadcontrolledhisglidersbyshiftinghisbodyinthedesireddirection.ThisideawasrepellenttotheWrightbrothers,however,andtheysearchedformoreefficientmethodstocontrolthebalanceof
5、airbornevehicles.In1900and1901,theWrightstestednumerousglidersanddevelopedcontroltechniques.Thebrothers′inabilitytoobtainenoughliftpowerfortheglidersalmostledthemtoabandontheirefforts.Afterfurtherstudy,theWrightbrothersconcludedthatthepublishedtablesofairpressureoncurvedsurfac
6、esmustbewrong.Theysetupawindtunnelandbeganaseriesofexperimentswithmodelwings.Becauseoftheirefforts,theoldtableswererepealedintimeandreplacedbythefirstreliablefiguresforairpressureoncurvedsurfaces.Thiswork,inturn,madeitpossibleforthemtodesignamachinethatwouldfly.In1903theWright
7、sbuilttheirfirstairplane,whichcostlessthanonethousanddollars.Theyevendesignedandbuilttheirownsourceofpropulsion-alightweightgasolineengine.WhentheystartedtheengineonDecember17,theairplanepulsatedwildlybeforetakingoff.Theplanemanagedtostayaloftfortwelveseconds,however,anditflew
8、onehundredtwentyfeet.By1905theWrightshadperfectedthefirstairp
