2020年职称英语综合类阅读判断基础练习(一)

1、2020年职称英语综合类阅读判断基础练习（1）Onlyspecialplantscansurvivetheterribleclimateofadesert,fortheseareregionswheretheannualrangeofthesoiltemperaturecanbeover75C。Furthermore,duringthesummertherearefewcloudsintheskytoprotectplantsfromthesun'sray.Anotherproblemisthefactthattherearefrequentlystrongwindswhichdriv

2、esmall,sharpparticlesofsandintotheplants,tearinganddamagingthem.Themostdifficultproblemforallformsofplantlife,however,isthefactthattheentireannualrainfalloccursduringafewdaysorweeksinspring.Grassesandflowersindesertsurvivefromoneyeartothenextbyexistingthroughthelong,hot,dryseasonintheformofseeds.The

3、seseedsremaininactiveunlesstherightamountofrainfalls.Ifnorainfalls,orifinsufficientrainfalls,theywaituntilthenextyear,orevenstillthenext.Anotherfactorthathelpstheseplantstosurviveisthefactthattheirlifecyclesareshort.Bythetimethatthewaterfromthespringrainsdisappearsjustafewweeksafteritfallssuchplants

4、nolongerneedany.Theperennialshavespecialfeatureswhichenablethemtosurviveasplantsforseveralyears.Thus,nearlyalldesertperennialshaveextensiverootsystemsbelowgroundandasmallshootsystemaboveground.Thelargerootnetworkenablestheplanttoabsorbasmuchwateraspossibleinashorttime.Thesmallshootsystem,ontheotherh

5、and,considerablylimitswaterlossbyevaporation.Anotherfeatureofmanydesertperennialsisthataftertherainyseasontheylosetheirleavesinpreparationforthelong,dryseason,justastreesinwetterclimateslosetheirsinpreparationforthewinter.Thisreducestheirwaterlossbyevaporationduringthedryseason.Then,innextrainyseaso

6、n,theycomefullyaliveoncemore,andgrownewbranches,leavesandflowers,justasthegrassesandflowersindesertdo.16. Ordinaryplantsareunabletosurviveinthedesertmainlybecauseofthechangeableweather.A.RightB.WrongC.Notmentioned17. Grassesandflowersindesertareabletosurvivebecausetheystayintheformofseedstowaitforth

7、erightamountofwatertocome.A.RightB.WrongC.Notmentioned18. Grassesandflowersinthedesertwhoselifecyclesareshortshowstheirabilitytoadapttothequickdisappearanceofrainwaterthereafteritfallsinspring.A.RightB.WrongC.Notmentioned19. WinteristhetoughestseasonforgrassesandflowerstosurviveindesertA.RightB.Wron

8、gC.Notmentioned20. Theshootsystemofperennialscanhelptheplantsabsorblessofthesun'sray.A.RightB.WrongC.Notmentioned21. Thethemeofthesecondlastparagraphiswhytheperennialscansurviveasplantsforseveralyears.A.RightB.WrongC.Notmentioned22. Desertperennialslosetheirleavesaftertherainyseasonjustastreeslosetheirsinwettercl