17.Rainforests,it turns out,are not created equal.Take the Amazon rainforest,an area that covers about 7million square kilometers.But within that huge expanse are all kinds of ecological zones,and some of these zones,says Greg Asner,are a lot more crowded than others.
"Some forests have many species of trees,"he said,"others have few.Many forests are unique from others in terms of their overall species composition…"And all of these different small areas of forest exist within the giant space that is the Amazon Rainforest.
So Asner,using the signature technique called airborne laser-guided imaging spectroscopy,began to map these different zones from the air."By mapping the traits of tropical forests from above,"he explains,"we are,for the first time,able to understand how forest composition varies geographically."
The results show up in multicolored maps,with each color representing different kinds of species,different kinds of trees,the different kinds of chemical they are producing and using,and even the amount of biodiversity,the animal and plant species that live within each zone.
Armed with this information,Asner says decision-makers now have"a first-time way to decide whether any given forest geography is protected well enough or not.If not,then new protections can be put in place to save a given forest from destruction."
Asner says the information is a great way for decision-makers to develop a"cost-benefit ratio type analysis."Conservation efforts can be expensive,so armed with this information,government leaders can ensure they are making the most of their conservation dollars by focusing on areas that are the most biologically diverse or unique.
The next step,Asner says,is to take his project global,and to put his eyes even higher in the sky,on orbital satellites."The technique we developed and applied to map Peru is ready to go global."Asner said."We want to put the required instrumentation on an Earth-orbiting satellite,to map the planet every month,which will give the best possible view of how the world's biodiversity is changing,and where to put much needed protections.
25.Unequally-created rainforests refer to the factD.
A.how crowded they are
B.where they are located
C.when they came into being
D.what kinds of species they have
26.What can government leaders learn from Asner's mapping?C
A.The cost to conserve forests
B.The chemicals needing for certain forests
C.The forest areas needing special protection
D.The number of animals living in a forest
27.What is Asner planning to do now?B
A.To send a satellite to map the world
B.To track the change of biodiversity in the world
C.To develop technology for mapping the globe
D.To advertise his project around the world
28.What does the passage mainly talk about?A
A.Using eyes in the sky to map biodiversity
B.Making a map of big forests in the world
C.Learning about the biodiversity of Amazon forest
D.Protecting the forest from being destructed.
分析 本文是一篇新聞報道類閱讀,本文敘述了雨林對氣候的影響,目前雨林所面臨的危機以及如何采取措施拯救雨林.介紹了科研人員通過高科技來測繪雨林中物種的分布,從而能夠了解雨林中物種的變化,以及哪些地區(qū)的物種需要特殊保護,從而更好地保護雨林資源.
解答 25-28DCBA
25.D.推理判斷題.根據(jù)第二段"Some forests have many species of trees,others have few.Many forests are unique from others in terms of their overall species composition…"可知之所以說是不平等創(chuàng)造的雨林是因為它們所包含的物種不同.故選D.
26.C.細節(jié)理解題.根據(jù)第五段"Asner says decision-makers now have"a first-time way to decide whether any given forest geography is protected well enough or not."可知政府領(lǐng)導人可以知道需要特別保護的森林地區(qū).故選C.
27.B.細節(jié)理解題.根據(jù)最后一段"We want to put the required instrumentation on an Earth-orbiting satellite,to map the planet every month,which will give the best possible view of how the world's biodiversity is changing,and where to put much needed protections."可知現(xiàn)在Asner計劃追蹤世界上生物多樣性的變化.故選B.
28.A.主旨大意題.通讀全文可知本文主要介紹了科研人員通過高科技來測繪森林中物種的分布,從而能夠了解森林中物種的變化,以及哪些地區(qū)的物種需要特殊保護,從而更好地保護森林資源.故選A.
點評 此題主要考查學生的細節(jié)理解和推理判斷能力.做細節(jié)理解題時要結(jié)合原文和提干有針對性的找出相關(guān)語句進行仔細分析,再結(jié)合選項選出正確答案.在做推理判斷題時不要以個人的主觀想象代替文章的事實,要根據(jù)文章事實進行合乎邏輯的推理判斷.