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1、阅读理解训练（7）阅读下列四篇短文，从每小题后所给的A,B,C或D四个选项中，选出最佳选项。PLAYAGRANDE,COSTARICA?ThisresorttownwaslongknownforLeatherbackSeaTurtle(棱皮龟)nationalPark,nightlyturtlebeachtoursandevenaseaturtlemuseum.However,onabeachwheredozensofturtlesusedtonestonagivennight,scientistsspiedonly32leatherba
2、cksalloflastyear.Withleatherbacksthreatenedwithextinction(灭绝),PlayaGrande’sturtlemuseumwasabandonedthreeyearsagoandnowsitsamongaseaofweeds.AndthebeachsideticketofficeforturtletourswaswashedawaybyahightideinSeptember.“Wedonotpromotethatasaturtletourismdestinationanymorebec
3、ausewerealizetherearefartoofewturtlestoplease,”saidAlvaroFonseca,aparkranger(管理员).Evenbeforescientistsfoundtemperaturesgoingupoverthepastdecade,seaturtleswerethreatenedbybeachdevelopment,driftnetfishingandCostaRicansinterestineatingturtleeggs.Butclimatechangemaycausethemo
4、stseriousharmtoananimalthathaslivedinthePacificfor150millionyears.Seaturtlesaresensitivetonumerouseffectsofwarming.Theyfeedonreefs,whicharedyinginhotterseas.Theylayeggsonbeachesthatarebeingcoveredbyrisingseasandmoreviolentwaves.Moreuniquelytheirgender(性别)isdetermined,notb
5、ygenesbutbytheegg’stemperatureduringdevelopment.Smallrisesinbeachtemperaturescanresultinail-femalepopulations,obviouslyproblematicforsurvival.Ifthesandaroundtheeggshits30degreesCelsius,thegenderbalanceshitstofemales:atabout32degreestheyareallfemale.Above34,yougetboiledegg
6、s.Onsomenestingbeaches,scientistsareartificiallycoolingnestswithshadeorirrigationandtryingtoprotectbroaderareasofcoastalpropertyfromdevelopmenttoensurethatturtleshaveaplacetonestastheseasrise.1.Whydoestheresorttownstoppromotingit’sturtletourism?-9-A.Itdecidesnottodisturbt
7、heturtles’normallife.B.Touristshavelostinterestinwatchingturtles.C.Thereareonlyveryfewturtlesnow.D.Theturtlemuseumwasdestroyedbyahightide.2.Whichofthefollowingisthemajorfactorintheturtlesendangerment?A.Thelocalseatinghabit. B.Driftnetfishing.C.Beachdevelopment. D.Gl
8、obalwarming.3.Welearnfromthelastparagraphthatscientists .A.aredoingresearchontheseariseB.aremo
