字典翻译 问答 小学 英语 Treesareusefultomaninthreeimportantways:theygivehimwoodandotherusefulthingstheygivehimcoolplacesandtheyhelptostopdroughtandflood.Unluckilyinmanypartsoftheworldmanhasnotfoundthatthethirdo
问题标题:
Treesareusefultomaninthreeimportantways:theygivehimwoodandotherusefulthingstheygivehimcoolplacesandtheyhelptostopdroughtandflood.Unluckilyinmanypartsoftheworldmanhasnotfoundthatthethirdo
问题描述:

Treesareusefultomaninthreeimportantways:theygivehimwoodandotherusefulthingstheygivehimcoolplacesandtheyhelptostopdroughtandflood.

Unluckilyinmanypartsoftheworldmanhasnotfoundthatthethirdofthesepointsisthemostimportant.Manwantstomakemoneyfromtreessohehascutthemdowninlargenumbersonlytofindthatwithoutthemhehaslostthebestfriendshehad.Andalsoheisusuallytoocarelesstoplantandlookafternewtrees.Sotheforestsslowlydisappear.

Thisdoesnotonlymeanthatmanwillhavefewertrees.Theresultsareevenworse:forwheretherearetreestheirrootsbreakupsoilmaketheraininandalsobindthesoilthusstoppingitfrombeingwashedawayeasily;butwheretherearenotreestherainfallsonhardgroundandflowsawaycausingfloodsandcarryingawaytherichtop-soil.Whenallthetop-soilisgonenothingisleftbutuselessdesert.

36.Themostimportantpointsoftreestomanisthat________.

A.theyhelphimtomakemoney B.theygivehimcool

C.theygivehimwoodandotherthings D.theyhelphimtostopdroughtandfloods

37.Inmanyplacesforestsslowlydisappearbecause________.

A.manytreeshavebeencutdownbyman

B.newtreesarenotwelllookedafter

C.manhasnotpaidenoughattentiontoplantingtrees

D.alltheabove

38.Landbecomesdesertafteralltreesarecutdownbecause________.

A.rootsoftreesbreakupthesoil B.therearetoomanyrainfallstomakeit

C.strongwindsbringalotofsand D.notreekeepstherainandprotectsthetop-soil.

39.Whichtitlebestfitsthepassage?

A.TreesandMan B.TheFunctionofTreeWood

C.WhatdoPeopledowithTrees? D.TheUsageofTreeRoots

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