托福阅读材料：南极发现苍蝇.doc

《托福阅读材料：南极发现苍蝇.doc》由会员上传分享，免费在线阅读，更多相关内容在工程资料-天天文库。

1、托福阅读材料：南极发现苍蝇小马过河为人家准备了“新托福阅读材料:南极发现苍蝇”，供各位备考托福的考生们参考使用，来提高白己的托福成绩！免费咨询电话：400-012：3-267南极对于许多生物來说是荒芜严寒恐怖的死亡大陆,尤其是像苍觑这样喜欢生活在炎热区域的昆虫。而近來科学家却在南极发现了苍婉，这是怎么冋事呢?下面的新托福考试阅读练习资料卑•我们会为人家详细介绍。Sometimesthebiggestfindsarethesmallestfinds・Researchersexaminingasegmentofsiltstonetakenfromgro

2、undalongtheBeardnioreglacierinAntarcticafoundsomethingunexpected・Theyfoundafly.Well,notexactlyafly.Theyfoundaflyfossilsasegmentoftheexoskeleton,theprotectiveshell,ofafly1arva・Whilethelarvaearesti11growing,theyareprotectec!byathinshel1・Andwherethere"slarvalshell,thereareflies・S

3、owhatarefliesdoinginAntarctica?Itsmuchtoocoldthereforflies・Andtheclosestfly-friendlylocation,SouthAmerica,isthousandsofmilessway.Partoftheansweristhattheflyfossilisancient・itwasfoundwithanumberofotherfossilizedthingsthathavebeendatedbetweenthreemillionandseventeenmillionyearso

4、ld.It'spossiblethattheflylivedduringaperiodwhensealevelsweremuchlowertherethantheynoware・Lowersealevelsmeanswidercontinents-thinkofstandingontheedgeofabeachandhavingthewaterpullback.Andwidercontinentsmeansit"smorelikelythatlivingthingsmighttravelacrossthegap.Ormaybenot.Maybefl

5、iesaremucholderthananyonethought・Weknowthatwhatwenowcal1AntarcticawasonceconnectedtobothSouthAmericaandAustralia・Butthatwasaroundeightymillionyearsago,andfliesaren'tthoughttobethatold.Whatevertheansweris,somethinginourunderstandingofthecontinents,theseas,orflyevolutionhastobef

6、ixed・That"soneofthebestthingsaboutscienee■dreallybigchangecancomefromthediscoveryofsomethingreallysmall.来源于：小马过河相关推荐:^GaohAa小马过河国际教育Xw.xiaomaxomIHiaomaInternationa—eoucatzion托福阅读利剑之语法托福阅读解题方法之《主旨题》