大学英语四级阅读理解试题(内含答案)(13)

英语四级阅读理解训练集(40篇)!

c.itsindustrialcompetitiveness

d.itscontributionstoworldpeace

3.Theauthorindicatesthat______isthreateningAmericanpoliticalpower.

a.othercountries

b.thedecliningU.S.industrialbase

c.anewstandardformeasuringpower

d.lessadvancedtechnology

4.Americasucceededinshapingworldeventsoverpast40yearsprobablybecauseof___________.

a.itsabilitytoadapttechnology

b.itsabilitytotakeadvantageofthecapabilitiesofitspeople

c.itsabilitytocompeteintheworldmarkets

d.bothaandb

5.Thepurposeofwritingthisarticleis__________.

a.todrawthereaders'attentiontoanewstandardformeasuringpower

b.todemonstrateAmericanpoliticalinfluenceintheworld

c.toemphasizethateffortsmustbemadetostrengthenthedecliningU.S.industrialbase

d.toshowAmericanindustrialprowess

15/200答案：dabdc

大学英语四级阅读理解试题40篇之十六（含答案）

16/200

Treesshouldonlybeprunedwhenthereisagoodandclearreasonfordoingsoand,fortunately,thenumberofsuchreasonsissmall.Pruninginvolvesthecuttingawayofobergrownandunwantedbranches,andtheinexperiencedgardenercanbeencouragedbythethoughtthatmoredamageresultsfromdoingitunnecessarilythanfromleavingthetreetogrowinitsownway.

First,pruningmaybedonetomakesurethattreeshaveadesiredshapeorsize.Theobjectmaybetogetatreeoftherightheight,andatthesametimetohelpthegrowthofsmallsidebrancheswhichwillthickenitsappearanceorgiveitaspecialshape.Secondly,pruningmaybedonetomakethetreehealthier.Youmaycutdiseaedordeadwood,orbranchesthatarerubbingagainsteachotherandthuscausewounds.Thehealthofatreemaybeencouragedbyremovingbranchesthatareblockingupthecentreandsopreventingthefreemovementofair.

Oneresultofpruningisthatanopenwoundisleftonthetreeandthisprovidesaneasyentryfordisease,butitisawoundthatwillheal.Oftenthereisaracebetweenthehealingandthedeseaseastowhetherthetreewillliveordie,sothatthereisaperiodwhenthetreeisatrisk.Itshouldbetheaimofeverygardenertoreducewhichhasbeenprunedsmoothandclean,forhealingwillbesloweddownbyroughness.Youshouldallowthecutsurfacetodryforafewhursandthenpaintitwithoneofthesubstancesavailablefromgardenshopsproducedespeciallyforthispurpose.Pruningisusuallywithoutinterferencefromtheleavesandalsoitisveryunlikelythatthecutsyumakewillbleed.Ifthisdoeshappen,itis,ofcourse,impossibletopaintthemproperly.

1.Pruningshouldbedoneto______.

a.makethetreegrowtaller

b.improvetheshapeofthetree

c.getridofthesmallbranches

d.makethesmallbranchesthicker

2.Treesbecomeunhealthyifthegardener______.

a.allowstoomanybranchestogrowinthemiddle

b.doesnotprotectthemfromwind

c.forcesthemtogrowtooquickly

d.damagessomeofthesmallsidebranches

3.Whyisaspecialsubstancepaintedonthetree?

a.Tomakeawoundsmooth

b.Topreventdiseaseenteringawound

c.Tocoveraroughsurface

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