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A.revealedB.countsC.responsibleD.releaseE.virtuallyF.extentG.annuallyH.extinctI.extendsJ.monitorK.realizedInthetimethatrecordshavebeenkeptofbirdpopulations,20percent
题目详情
A.revealed | B.counts | C.responsible | D.release |
E.virtually | F.extent | G.annually | H.extinct |
I.extends | J.monitor | K.realized |
Every October for more than two decades,teams from the University of New South Wales in Australia counted birds from an airplane flown low over 130,000square miles of wetlands in the eastern third of the continent.Their (44)___ showed a steady decline,beginning in the mid-1980s.By 2006the number of migratory shorebirds had dropped by 73percent and the number of Australia's resident of shorebirds had fallen by 81percent."The(45)___ of the decline took us by surprise,"says evolutionary ecologist Silke Nebel of the University of Western Ontario in London,the lead author of the report.
The survey (46)___ that inland wetlands were more important to both resident and migratory birds than had been (47)___,and that wetland loss from damming (筑坝) and the diversion (分散) of river water for irrigation was at least in part (48)___ for the shorebird decline in Australia.But wetlands are becoming smaller in countries all along the major flyway that (49)___ from eastern Siberia to New Zealand,the study's authors note,so protecting the 8million birds that use the corridor (50)___ will require an international solution.
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答案和解析
H D J B F A K C I G 41.H 考察名词.根据the decline 可知,鸟的种类正在灭绝.42.D 考察名词.one of the clearest pictures 暗示填release发行一些图片.43.J 考察动词.前句提到很多鸟正在消失,包括很难监测...
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