北京市海淀区2016届高考英语完形填空和阅理暑假自练(7)阅读下列四篇短文,从每小题后所给的A,B,C或D四个选项中,选出最佳选项
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,waterpumpedthroughthepipespicksupthisheatandtakesitun







