Sometimes，thesimplestideasarethebest．Forexample，toabsorbheatfromthesuntoheatwater，youneedlarge，flat，blacksurfaces．Onewaytodothatistobuildthosesurfacesspecially，ontheroofsofbuildings．Butwhygotoallt
Sometimes，thesimplestideasarethebest．Forexample，toabsorbheatfromthesuntoheatwater，youneedlarge，flat，blacksurfaces．Onewaytodothatistobuildthosesurfacesspecially，ontheroofsofbuildings．Butwhygotoallthattroublewhencitiesarefullofblacksurfacesalready，intheformofasphalt （柏油） roads？
Tenyearsago，thisthoughtcameintothemindofAriandeBondt，aDutchengineer．Hefinallypersuadedhisbosstofollowitup．Theresultisthattheirbuildingisnowheatedinwinterandcooledinsummerbyasystemthatreliesonthesurfaceoftheroadoutside．
Theheat-collectorisasystemofconnectedwaterpipes．Mostofthemrunfromonesideofthestreettotheother，justundertheasphaltroad．Some，however，divedeepintotheground．
Whenthestreetsurfacegetshotinsummer，waterpumpedthroughthepipespicksupthisheatandtakesitundergroundthroughoneofthedivingpipes．Atadepthof100metresliesanaturalaquifer （蓄水层） intowhichseveralheatexchangers （交换器） havebeenbuilt．Thehotwaterfromthestreetrunsthroughtheseexchangers，warmingtheground-water，beforereturningtothesurfacethroughanotherpipe．Theaquiferisthususedasaheatstore．
Inwinter，theworkingsystemischangedslightly．Waterispumpedthroughtheheatexchangerstopickuptheheatstoredduringsummer．Thiswatergoesintothebuildingandisusedtowarmtheplaceup．Afterperformingthattask，itispumpedundertheasphaltanditsremainingheatkeepstheroadfreeofsnowandice．
64．Whichofthefollowingistrueaccordingtothefirsttwoparagraphs？___
A．AriandeBondtgothisideafromhisboss．
B．Large，flat，blacksurfacesneedtobebuiltincities．
C．TheDutchengineer'ssystemhasbeenwidelyused．
D．Heatcanalsobecollectedfromasphaltroads．
65．Forwhatpurposearethedivingpipesused？___
A．Toabsorbheatfromthesun．
B．Tostoreheatforfutureuse．
C．Toturnsolarenergyintoheatenergy．
D．Tocarryheatdownbelowthesurface．
66．Fromthelastparagraphwecanlearnthat___
A．somepipeshavetobere-arrangedinwinter
B．thesystemcandomorethanwarmingupthebuilding
C．theexchanger