阅读理解 Treesareusefultomaninthreeimportantways:Theyprovidehimwithwoodandotherproducts;theyprovidehimshade;.andtheyhelptopreventdroughts(早灾)andfloods. Unfortunatelyinmanypartsoftheworldmanhasnotrealizedthatthethirdoftheseservicesisthemostimportant.Inhiseagernesstomakemoneyfromtreeshehascutthemdowninlargenumbersonlytofindthatwithoutthemhehaslostthebestfriendshehad.Andbesidesheisusuallytoocarelesstoplantandlookafternewtrees.Sotheforestsslowlydisappear. Thisdoesnotonlymeanthatmanwillhavefewertrees.Theresultsareevenmoreserious:forwheretherearetreestheirrootsbreakupsoilallowingtheraintosinkinandalsobind(固定)thesoilthuspreventingitfrombeingwashedawayeasily;butwheretherearenotreestherainfallsonhardgroundandflowsawaycausingfloodsandcarryingawaytherichtop-soil.Whenthetop-soilisgonenothingremainsbutworthlessdesert. Twothousandyearsago,arichandpowerfulcountrycutdownitstreestobuildwarshipswithwhichtogainitselfanempire(帝国).Itsetuptheempirebutwithoutitstreesitssoilbecamepoorandgrewweak.Whentheempirefelltopiecesthehomecountryfounditselffacedbyfloodsandstarvation(饥荒). | (1) Themostimportantserviceoftreestomanisthat________. [ ] A. theygivethemwoodandotherproducts|
B. theygivethemshade|
C. theyhelphimpreventdroughtsandfloods|
D. theyhelphimmademoney|
| (2)
Inmanypartsoftheworldforestsslowlydisappearbecause________.
[]
A.
manytreeshavebeencutdown
范皆备回答:
答案:1.C;2.D;3.C;4.D;5.A;
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