Unit6-單元背景探索閱讀課件

素養(yǎng)閱讀系列單元背景探索閱讀讀有所獲練有所得詞匯積累長難句分析學(xué)有所益閱讀提示：你想了解匪夷所思的自然現(xiàn)象“納尼比亞精靈圈”嗎？請看本文。讀有所獲AcrossthearidgrasslandoftheNamibDesertliesastrangesight：millionsofcircularpatchesoflandlackingplants,eachbetween2mand15mindiameter,arearrangedinahoneycomb-likepatternacross2，500kmofland.Thesedisksofbaresoil,knownasfairycircles,“pockmark(凹坑)，，thelandscapeinNamibia,asifgiantmothsatethroughthevastcarpetsofgrassland.①Addingtothemystery,nooneknowsforcertainwhatcausestheseotherworldly(超脫塵世的）formations，writesQuorauserPremRathaur.Butthere’snoshortageoftheories.讀有所獲Scientistshavesuggestedradioactivesoil,ortoxins(毒素）comingfromplantskillsthevegetationincircularpatterns.Othersbelievethecirclesaretheworkofsandtermites(白蟻）.Tostorewater,theydiginthesoilinring-likepatternsandconsumetherootsofvegetationtoallowunderlyinggrainsofsandtoabsorbfallingrain.Anotherassumptionascribesthecirclestocompetitionforresources.Inharshconditions,plantscompeteforwaterandnutrients.Asweakerplantsdieandstrongeronesgrow,vegetation“self-organizes”intounusualpatterns.Consideringtheeerie(神秘的)beautyofthisphenomenon，perhapsthemostfittingtheoryisthatoflocalBushmen,whosayfairycirclesarenothinglessthanthefootprintsofGod.②讀有所獲答案:1.InNamibia答案解析1練有所得Wherearethefairycircles?___________________________________Whoknowsforcertainwhatcausestheseotherworldlyformations?__________________________________________答案:2.Noone答案解析2練有所得1.addto 增添2.radioactive adj.有福射的;放射性的3.ascribesth.to... 把......歸因于…,為……是由于……詞匯積累學(xué)有所益長難句分析①句意:在納米比亞，這些被稱為精靈圈的圓盤狀裸露土壤塑造出凹痕景觀，就好像巨型蛾子在大片草原上肆虐吞食。分析:這是一個主從復(fù)合句。asif引導(dǎo)虛擬條件從句。②句意:對于這一現(xiàn)象的神秘之美，大概最合適的推測