【Didyouknowthatvegetablescangrowintheclimatestheyarenotusedto?Coolclimatevegetableslikeasparagus(芦笋)arenowabletobegrowninplacesashotasHawaii.InHawaiimarine(海的)engineershavebeenabletoactuallyle】

　　Didyouknowthatvegetablescangrowintheclimatestheyarenotusedto?Coolclimatevegetableslikeasparagus(芦笋)arenowabletobegrowninplacesashotasHawaii.InHawaiimarine(海的)engineershavebeenabletoactuallyletyoubelievesuchvegetablesthattheyarelivingincoolerclimates.Inthatwaytheygrowfasterandtastebetter.Whattheseengineershavebeenusingisverysimplycoldseawater.Howdidtheyuseit?Theyplacepipesinthesoilandcoldwaterflowingthroughthemcoolstheearth.Thiscausesplantgrowthandenablesgardenersintropicalclimates(热带气候)togrowcropsfromcoolerclimates.Alsosomeofthesepipesareexposedtotheairandtheymaketheair“wet”andthuswaterthegardens.Whatespeciallymakespeoplehappyaboutthisprocess(过程)isthatnothingtothenaturalconditionsisbeingused.Anothernewuseforcoldoceanwateristocoolbuildings.EngineersbelievethatforexampletheentirewestcoastoftheUnitedStatescouldbeair-conditionedusingseawater.

　　72.Whatdoesthenewsystemenablethegardenerstodo?

　　A.Waterthefieldwithseawater. B.Growasparagusinhotplaces.

　　C.Growcoolclimatevegetablesinhotareas. D.Coolthesoil.

　　73.Seawatermentionedinthepassageismainlyusedto________.

　　A.waterthefarms B.waterthegardens

　　C.cooltheair D.maketheearthcool

　　74.Whatisthereportmainlyabout?

　　A.Howtogrowvegetablesinhotareas. B.Howtogrowcropsintropicalclimates.

　　C.Howtocoolthesoil. D.Howtouseseawater.

　　75.Itcanbeinferredfromthepassagethat________.

　　A.seawatercanactasanair-conditioner

　　B.asparagusareonlygrowninhotplaces

　　C.thewriterwantstotellussomethingaboutscientificadvance

　　D.seawaterhasmanyadvantages