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Save Energy At Home On the average, Americans waste as much energy as two-thirds of the wor...
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Youshouldtakeintoconsiderationthefactthatwehavebeenverybusyrecently.
Shewillbepleasedtomeetyou.
BlackHolesMostscientistsagreethatblackholesexistbutarenearlyimpossibletolocate.A．blackholeintheuniverseisnotasolidobjectlikeaplanetbutitisshapedlikeasphere球体.Astronomers天文学家thinkthatatthecenterofablackholethereisasinglepointinspacewithinfinite无限的density稠密.Thissinglepointiscalledasingularity奇点.Ifthesingularitytheoryiscorrectitmeansthatwhenamassivestarcollapsesallthematerialinitdisappearsintothesingularity.Thecenterofablackholewouldnotreallybeaholeatallbutaninfinitelydensepoint.Anythingthatcrossestheblackholeispulledinbyitsgreatgravity.Althoughblackholesdoexisttheyaredifficulttoobserve.Thesearethereasons.·Nolightoranythingelsecomesoutofblackholes.Asaresulttheyareinvisibletoatelescope.·Inastronomicaltermsblackholesaretrulytiny.Forexampleablackholeformedbythecollapseofagiantstarwouldhaveaneventhorizon视界only18milesacross.·ThenearestblackholeswouldbedozensoflightyearsawayfromEarth.Onelightyearisabout6trillion万亿miles.Eventhemostpowerfultelescopescouldnotpickoutanobjectsosmallatsuchagreatdistance.In1994theHubbleSpaceTelescopeprovidedevidencethatblackholesexist.Therearestillanswerstobefoundhoweversoblackholesremainoneofthemysteriesoftheuniverse.Thenearestblackholesarehundredsoflightyearsawayfromus.
Thepolicemanwrotedownalltheparticularsoftheaccident.
Thepresidentproposedthatweshouldbringthemeetingtoaclose.
Themountainslookgloriousatsunrise.
EarthquakeHowdoesanearthquakestartWhatmakesanearthquakehappenTherockoftheearth’scrust地壳mayhaveafaultakindofbreakinthesurface.Theblockswhichmakeuptheearthmoveandsometimesthismaycausethesidesofthefaulttomoveupanddownorlengthways纵向againsteachother.Whenonepieceofrockstartstorubonanotherwithgreatforcealotofenergyisused.Thisenergyischangedintovibrations振动anditisthesevibrationsthatwefeelasanearthquake.ThevibrationscantravelthousandsofkilometersandsoanearthquakeinTurkeymaybefeltinGreeceWhattododuringanearthquakeAtschoolAssoonastheearthquakestartsstudentsshouldgetunderthedesksimmediatelyandwaituntiltheteachertellsthemitissafetocomeout.Theteachershouldatthesametimegoimmediatelytotheteacher’sdeskgetunderneath在下面itandstaytheretillthedangerisover.Studentsmustnotarguewiththeteacherorquestioninstructions.Assoonasthetremors震动stopallstudentsshouldwalktowardstheexitandgostraighttotheschoolplaygroundoranyopenspacesuchasasquareorapark.Theymustwaitthereuntiltheteachertellsthemitissafetogo.AthomeIfyouareathomewhentheearthquakeoccursgetimmediatelyunderthetableinthelivingroomorkitchen.Choosethebiggestandstrongesttableyoucanfind.Youmustnotgoanywherenearthewindowanddon’tgooutontothebalcony阳台.Oncethetremorshavestoppedyoucancomeoutfromunderthetablebutyoumustleavethebuildingstraightaway.Youshouldwalkdownthestairsandshouldnotusethelift—theremaybeapowercutasaresultoftheearthquakeandyoucouldfindyourselftrappedinsidetheliftforhours.InthestreetIfyouareinthestreetwhentheearthquaketakesplacedonotstandnearbuildingsfencesorwalls—moveawayasquicklyaspossibleandtrytofindalargeopenspacetowaitin.Standingundertreescouldalsobedangerous.Peopleknewlongagohowanearthquakestarts.
BlackHolesMostscientistsagreethatblackholesexistbutarenearlyimpossibletolocate.A．blackholeintheuniverseisnotasolidobjectlikeaplanetbutitisshapedlikeasphere球体.Astronomers天文学家thinkthatatthecenterofablackholethereisasinglepointinspacewithinfinite无限的density稠密.Thissinglepointiscalledasingularity奇点.Ifthesingularitytheoryiscorrectitmeansthatwhenamassivestarcollapsesallthematerialinitdisappearsintothesingularity.Thecenterofablackholewouldnotreallybeaholeatallbutaninfinitelydensepoint.Anythingthatcrossestheblackholeispulledinbyitsgreatgravity.Althoughblackholesdoexisttheyaredifficulttoobserve.Thesearethereasons.·Nolightoranythingelsecomesoutofblackholes.Asaresulttheyareinvisibletoatelescope.·Inastronomicaltermsblackholesaretrulytiny.Forexampleablackholeformedbythecollapseofagiantstarwouldhaveaneventhorizon视界only18milesacross.·ThenearestblackholeswouldbedozensoflightyearsawayfromEarth.Onelightyearisabout6trillion万亿miles.Eventhemostpowerfultelescopescouldnotpickoutanobjectsosmallatsuchagreatdistance.In1994theHubbleSpaceTelescopeprovidedevidencethatblackholesexist.Therearestillanswerstobefoundhoweversoblackholesremainoneofthemysteriesoftheuniverse.Blackholesexistbutaredifficulttoobserve.
Whatisyourgoalinlife
Heisaphysician.
Theearthmovesaroundthesun.
Maryislookingforthebookshelostyesterday.
Marygetsupatsixo’clockeverymorning.
EarthquakeHowdoesanearthquakestartWhatmakesanearthquakehappenTherockoftheearth’scrust地壳mayhaveafaultakindofbreakinthesurface.Theblockswhichmakeuptheearthmoveandsometimesthismaycausethesidesofthefaulttomoveupanddownorlengthways纵向againsteachother.Whenonepieceofrockstartstorubonanotherwithgreatforcealotofenergyisused.Thisenergyischangedintovibrations振动anditisthesevibrationsthatwefeelasanearthquake.ThevibrationscantravelthousandsofkilometersandsoanearthquakeinTurkeymaybefeltinGreeceWhattododuringanearthquakeAtschoolAssoonastheearthquakestartsstudentsshouldgetunderthedesksimmediatelyandwaituntiltheteachertellsthemitissafetocomeout.Theteachershouldatthesametimegoimmediatelytotheteacher’sdeskgetunderneath在下面itandstaytheretillthedangerisover.Studentsmustnotarguewiththeteacherorquestioninstructions.Assoonasthetremors震动stopallstudentsshouldwalktowardstheexitandgostraighttotheschoolplaygroundoranyopenspacesuchasasquareorapark.Theymustwaitthereuntiltheteachertellsthemitissafetogo.AthomeIfyouareathomewhentheearthquakeoccursgetimmediatelyunderthetableinthelivingroomorkitchen.Choosethebiggestandstrongesttableyoucanfind.Youmustnotgoanywherenearthewindowanddon’tgooutontothebalcony阳台.Oncethetremorshavestoppedyoucancomeoutfromunderthetablebutyoumustleavethebuildingstraightaway.Youshouldwalkdownthestairsandshouldnotusethelift—theremaybeapowercutasaresultoftheearthquakeandyoucouldfindyourselftrappedinsidetheliftforhours.InthestreetIfyouareinthestreetwhentheearthquaketakesplacedonotstandnearbuildingsfencesorwalls—moveawayasquicklyaspossibleandtrytofindalargeopenspacetowaitin.Standingundertreescouldalsobedangerous.Ifyouareathomewhenanearthquakeoccursstandnearabigtable.
Ifheadachesonlyoccuratnightlackoffreshairisoftenthecause.
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EarthquakeHowdoesanearthquakestartWhatmakesanearthquakehappenTherockoftheearth’scrust地壳mayhaveafaultakindofbreakinthesurface.Theblockswhichmakeuptheearthmoveandsometimesthismaycausethesidesofthefaulttomoveupanddownorlengthways纵向againsteachother.Whenonepieceofrockstartstorubonanotherwithgreatforcealotofenergyisused.Thisenergyischangedintovibrations振动anditisthesevibrationsthatwefeelasanearthquake.ThevibrationscantravelthousandsofkilometersandsoanearthquakeinTurkeymaybefeltinGreeceWhattododuringanearthquakeAtschoolAssoonastheearthquakestartsstudentsshouldgetunderthedesksimmediatelyandwaituntiltheteachertellsthemitissafetocomeout.Theteachershouldatthesametimegoimmediatelytotheteacher’sdeskgetunderneath在下面itandstaytheretillthedangerisover.Studentsmustnotarguewiththeteacherorquestioninstructions.Assoonasthetremors震动stopallstudentsshouldwalktowardstheexitandgostraighttotheschoolplaygroundoranyopenspacesuchasasquareorapark.Theymustwaitthereuntiltheteachertellsthemitissafetogo.AthomeIfyouareathomewhentheearthquakeoccursgetimmediatelyunderthetableinthelivingroomorkitchen.Choosethebiggestandstrongesttableyoucanfind.Youmustnotgoanywherenearthewindowanddon’tgooutontothebalcony阳台.Oncethetremorshavestoppedyoucancomeoutfromunderthetablebutyoumustleavethebuildingstraightaway.Youshouldwalkdownthestairsandshouldnotusethelift—theremaybeapowercutasaresultoftheearthquakeandyoucouldfindyourselftrappedinsidetheliftforhours.InthestreetIfyouareinthestreetwhentheearthquaketakesplacedonotstandnearbuildingsfencesorwalls—moveawayasquicklyaspossibleandtrytofindalargeopenspacetowaitin.Standingundertreescouldalsobedangerous.Assoonasanearthquakeoccursstudentsshouldleavethebuilding.
Ittookusalongtimetomendthehouse.
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Theirparentsoncelivedunderverysevereconditions.
BlackHolesMostscientistsagreethatblackholesexistbutarenearlyimpossibletolocate.A．blackholeintheuniverseisnotasolidobjectlikeaplanetbutitisshapedlikeasphere球体.Astronomers天文学家thinkthatatthecenterofablackholethereisasinglepointinspacewithinfinite无限的density稠密.Thissinglepointiscalledasingularity奇点.Ifthesingularitytheoryiscorrectitmeansthatwhenamassivestarcollapsesallthematerialinitdisappearsintothesingularity.Thecenterofablackholewouldnotreallybeaholeatallbutaninfinitelydensepoint.Anythingthatcrossestheblackholeispulledinbyitsgreatgravity.Althoughblackholesdoexisttheyaredifficulttoobserve.Thesearethereasons.·Nolightoranythingelsecomesoutofblackholes.Asaresulttheyareinvisibletoatelescope.·Inastronomicaltermsblackholesaretrulytiny.Forexampleablackholeformedbythecollapseofagiantstarwouldhaveaneventhorizon视界only18milesacross.·ThenearestblackholeswouldbedozensoflightyearsawayfromEarth.Onelightyearisabout6trillion万亿miles.Eventhemostpowerfultelescopescouldnotpickoutanobjectsosmallatsuchagreatdistance.In1994theHubbleSpaceTelescopeprovidedevidencethatblackholesexist.Therearestillanswerstobefoundhoweversoblackholesremainoneofthemysteriesoftheuniverse.Theattractionoftwolargestarsleadstogravity.
Sinceancienttimespeoplehavefoundvariouswaystopreservemeat.
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Maryhasmadeuphermindnottogotothemeeting.
Itishighlyunlikelythatshewillarrivetoday.
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EarthquakeHowdoesanearthquakestartWhatmakesanearthquakehappenTherockoftheearth’scrust地壳mayhaveafaultakindofbreakinthesurface.Theblockswhichmakeuptheearthmoveandsometimesthismaycausethesidesofthefaulttomoveupanddownorlengthways纵向againsteachother.Whenonepieceofrockstartstorubonanotherwithgreatforcealotofenergyisused.Thisenergyischangedintovibrations振动anditisthesevibrationsthatwefeelasanearthquake.ThevibrationscantravelthousandsofkilometersandsoanearthquakeinTurkeymaybefeltinGreeceWhattododuringanearthquakeAtschoolAssoonastheearthquakestartsstudentsshouldgetunderthedesksimmediatelyandwaituntiltheteachertellsthemitissafetocomeout.Theteachershouldatthesametimegoimmediatelytotheteacher’sdeskgetunderneath在下面itandstaytheretillthedangerisover.Studentsmustnotarguewiththeteacherorquestioninstructions.Assoonasthetremors震动stopallstudentsshouldwalktowardstheexitandgostraighttotheschoolplaygroundoranyopenspacesuchasasquareorapark.Theymustwaitthereuntiltheteachertellsthemitissafetogo.AthomeIfyouareathomewhentheearthquakeoccursgetimmediatelyunderthetableinthelivingroomorkitchen.Choosethebiggestandstrongesttableyoucanfind.Youmustnotgoanywherenearthewindowanddon’tgooutontothebalcony阳台.Oncethetremorshavestoppedyoucancomeoutfromunderthetablebutyoumustleavethebuildingstraightaway.Youshouldwalkdownthestairsandshouldnotusethelift—theremaybeapowercutasaresultoftheearthquakeandyoucouldfindyourselftrappedinsidetheliftforhours.InthestreetIfyouareinthestreetwhentheearthquaketakesplacedonotstandnearbuildingsfencesorwalls—moveawayasquicklyaspossibleandtrytofindalargeopenspacetowaitin.Standingundertreescouldalsobedangerous.Ifyouareinthestreetwhenanearthquakeoccursstayinalargeopenspace.
TheSmog烟雾ForoveramonthIndonesiawasincrisis.Forestfiresragedoutofcontrolasthecountrysuffereditsworstdroughtfor50years.Smokefromthefiresmixedwithsunlightandhotdryairtoformacloudofsmog.ThispollutionquicklyspreadandwithindaysitwashangingoverneighbouringcountriesincludingMalaysiaSingaporeandThailand.Whenthesmokecombinedwithpollutionfromfactoriesandcarsitsoonbecamepoisonous有毒的.DangerousamountsofCObecametrappedunderthesmogandpollutionlevelsrose.Peoplewheezed喘息andcoughedastheyleftthehouseandtheireyeswateredimmediately.Thesmogmadeitimpossibletoseeacrossstreetsandwholecitiesdisappearedasgreysoot烟灰coveredeverything.Insomeareaswaterwashosed用胶管浇fromhigh-risecitybuildingstotryandbreakupthesmog.FinallyheavyrainswhichcameinNovemberputoutthefiresandclearedtheair.Buttheenvironmentalcostsandhealthproblemswillremain.ManypeoplefromSouth-EasternAsiancitiesalreadysufferfrombreathinghugeamountsofcarexhaustfumes汽车排放的废气andfactorypollution.Breathingproblemscouldwellincreaseandmanynon-sufferersmayhavedifficultiesforthefirsttime.Wildlifehassufferedtoo.Inlowlandforestselephantsdeerandtigershavebeendrivenoutoftheirhomesbysmog.ButsmogisnotjustanAsianproblem.InfactthewordwasfirstusedinLondonin1905todescribethemixtureofsmokeandthickfog.Fogoftenhungoverthecapital.Sometimesthesmogwassothickandpoisonousthatpeoplewerekilledbybreathingproblemsorinaccidents.About4000Londonersdiedwithinfivedaysasaresultofthicksmogin1952.Thesmogspreadtoneighbouringcountries.
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