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1、第一单元检测(时间:90分钟 满分:120分)第一部分 阅读理解(共两节,满分40分)第一节(共12小题;每小题2.5分,满分30分)阅读下面短文,从每题所给的A、B、C和D四个选项中,选出最佳选项。AIfyouhappentobeinHawaiiduringthemonthsofDecembertoApril,youwillfindtheseasaroundyouresoundingwithjoyousmusic—asymphonyofsqueaking,chirping,clickingandsplashing.Thesesoundsar
2、emadebywhales,anditisatlonglastthatthisuniqueunderwaterorchestraisbeingheardagain.ThereturnofthegreatwhalesintheeasternpartoftheNorthPacific,infact,isturningouttobeoneofthebestenvironmentalsuccessstories.AndthisphenomenonismostevidentallalongthecoastfromAlaskatoBaja,inCalif
3、ornia,andinHawaii.ThespeciesofwhalesthatmigratestoHawaii,comingallthewayfromAlaska,alongthecoastofcentralCalifornia,isthePacifichumpbackwhale(座头鲸).Theirjourney,whichisadistanceof3,500miles,fromtheirsummerhometoHawaiitakesabout1to2months.Thewhalesformlooseandlargegroupswhile
4、travelling.Theassociationstheyformalongthewaydonotlastmorethanafewdays.Butoneexceptionisthestrongbondthatmothersandcalveshavebetweeneachotherwhichlastsforalongtime.ThewarmwatersoftropicalHawaiiprovideidealconditionsforbreedingforthehumpback.Manyofthewhalescomeheretobreedcal
5、veswhileinHawaii.Thehumpbackisoneofthemostuniquemammalsbecauseofthespecialtalentsithas.Oneofthemistheabilitytosing.Theysingalargevarietyofcomplex,beautifulandlongsongs.Duringthebreedingperiod,themalesingslengthysongs,whichisthoughttoberelatedtomating,althoughitisnotyetprove
6、dthatitisusedasadevicetoattractfemales.Althoughthefemalesmakesoundstoo,itisonlythemalethatproducesorganizedandlengthysongs,whichcanbeeven20minuteslongandcanbeheard20milesaway.1ThePacifichumpbackwhalecomestoHawaiito . A.givebirthtotheiryoungB.findmorefoodC.findtheirmatesD.
7、avoidthehotsummer答案A解析细节理解题。从第三段的最后两句可知,夏威夷海水温暖,很适合座头鲸繁殖,这也是它们迁徙到此的原因。2Wecaninferfromthepassagethat . A.thehumpbackwhalecanonlybeseeninHawaiiB.theeasternpartoftheNorthPacifichasalwaysbeenwellprotectedC.thehumpbackoncedisappearedintheeasternpartoftheNorthPacificD.itisnotsu
8、rprisingthatthesongsofthehumpbackisbeingheardagain答案C解析推理判断题。概括前两段的信息可知,座头鲸能够重新回到北
