资源描述：
《2013高考英语二轮 阅读理解珍品训练（05）》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、2013高考英语二轮（阅读理解）珍品训练（05）及答案（******）Bothwarm-bloodedandcold-bloodeddesertanimalshavewaystoescapethedesertheat.Warm-bloodeddesertanimals,suchasratsandmice,restduringtheday,oftenstayingincoolundergroundburrows.Atnighttheysearchforfood.Animalsthatareoutduringtheday,suchascold-bloodedlizardsand
2、snakes,areactiveonlyforshortperiods.Astheirbodytem-peraturerises,thesereptilesmoveintotheshadeinordertocooldown.Intheearlyevening,whenthesungrowsweaker,thereptilesbecomemoreactiveandbegintheirsearchforfoodagain.Gettingenoughwatertosurviveisamajorproblemforalldesertanimals.Somedesertanimals
3、,likedesertbirds,managetofindwaterholes.Otherdesertanimals,suchasthekangarooratandtherelatedjerboa,getwateronlyfromthefoodthattheyeat.Becausetheseanimalseatmainlydryseeds,theymustsurviveonatinyamountofwater.Mostdesertshaveonlyasmallnumberoffrogsandtoadsbecausetheseanimalsmustbenearwatertos
4、urvive.Yeteventhesecreatureshaveadapted(适应)todesertconditions.Whensmallamountsofwatercollectintemporarystreams,thedesert-livingfrogsandtoadsbecomeactive.Afterarainfall,theylaytheireggs.Theeggsgrowintotadpolesinafewdaysandintoadultsinjustfourweeks,whenthepuddles(7](t7i;)dryup,theadultfrogso
5、rtoadsdigintotheground.Theirmetabolism(新陈代谢)slows,andtheystaybeneaththegrounduntilthenextrain,whichmaybeasgoodasayearaway.Untilthen,theirbodilyactivitiescontinueatareducedrate.Thecamel--oftencalledtheshipofthedesert--isoneofthemostsuccessfuldesertanimals.Camelscangoforlongpe-riodswithoutwa
6、ter,buteventuallytheymustdrink.Whenwaterbecomesavailabletothemafteralongdrought,theymaydrink95litersofwaterormore.Whenwaterisnotavailable,whathelpscamelssurvivethedesertheatisthefatstoredintheirhumps(驼峰).Acamel'shumpcontainsabout12kilogramsoffat.Fatisrichinhydrogen.Asthefatisdigested,hydro
7、genfromthefatcombineswithoxygenintheairthatthecamelbreathes.TheresultisH20,orwater.Eachkilogramoffatthatacameldigestsproducesaboutaliterofwater.1.Desertanimalsareusuallymoreactiveatnightbecause.A.itiscooleratnightB.itiseasiertofindwaterC.theylikethedarkD.theya
