欢迎来到天天文库
浏览记录
ID:45837958
大小:570.50 KB
页数:8页
时间:2019-11-18
《2019中考英语二轮复习 阅读理解优选(一)》由会员上传分享,免费在线阅读,更多相关内容在教育资源-天天文库。
1、2019中考英语阅读理解优选(一)【实战训练】A(2019中考科普环保类选练)TheWorld’sWaterShortage Theworldisnotonlyhungry,butitisalsothirstyforwater.Thismayseemstrangetoyou,sincenearly70percent(百分比)oftheearth’ssurfaceiscoveredwithwater.Butabout97percentofthishugeamountisseawater,orsaltwater.Mancanonlydrinkandusetheother3perc
2、ent-thefreshwaterfromrivers,lakes,underground,andothersources(资源).Andwecannotevenuseallofthat,becausesomeofitisintheformoficebergsandglaciers(冰川).Evenworse,someofithasbeenpolluted. However,asthingsstandtoday,thissmallamountoffreshwaterisstillenoughforus.Butourneedforwaterisincreasing(增加)rap
3、idly-almostdaybyday.Onlyifwetakestepstodealwiththisproblemnowcanweavoid(避免)asevere(严重的)worldwidewatershortagelateron. Weallhavetolearnhowtostopwastingourvaluablewater.Oneofthefirststepsistodevelopwaysofreusingit. Todayinmostlargecities,waterisusedonlyonceandthensentoutintoasewersystem(下水道
4、).Fromthereitreturnstotheseaorrunsintoundergroundstoragetanks.Butitispossibletopipeusedwatertoapurifying(净化)plant.Thereitcanbetreatedwithchemicalssothatitcanbeusedagain,justasifitwerefreshfromaspring. Butevenifeverylargecitypurifiedandreuseditswater,westillwouldnothaveenough.Allwe’dhavetodo
5、tomakeuseofthevastreserves(贮备)ofseawaterintheworldistoremovethesalt. Ifwetakethesestepswe’llbeinnodangerofdryingup. 1.Theworldisthirstyforwaterbecausewecanonlyuse_________percentofthewatercoveringthesurfaceoftheearth. A.3 B.morethan3 C.lessthan3 D.97 2.Whichofthefollo
6、wingstatementsisNottrue? A.Asthingsremainunchanging,thissmallamountoffreshwaterisstillenoughforus. B.Ourneedforwaterisbecominglargerandlarger. C.Therewillbenowatershortageinthefuture. D.Weshouldtakestepstodealwiththewatershortageproblem. 3.Toreusewater,weshould__________. A.treatitw
7、ithchemicals B.useitonlyonce C.senditoutintoasewersystem D.makeitflowintoundergroundtanks 4.Inordertohaveenoughwater,weshouldalsomakeuseof_________. A.icebergsandglaciers B.seawater C.riversandlake D.undergroundwater 5.Inthepass
此文档下载收益归作者所有