有幾個理論可以用來解釋公元前一萬年大動物的滅絕

大動物的 導(dǎo)致了動物的。老師對該理論也持否定態(tài)度。大動物的幾個解釋對應(yīng)原文第一段Byabout10000B.C.E.,allthosegiantcreatures,theMegfaunaofNorthAmericaweregone.Wedonotknowexactlywhathappenedtothem,buttherearesome正確答案分析錯誤答案分析確選項AAndthereisaClovissiteinavalleyinSouthernCaliforniawheretheremainsofthirteenmammothswerefound.Andspearpoints,toolsforprocessingmeat,andfireplaces.ThatwouldappeartobesomeprettycompellingC.最容易犯錯的選項，注意邏輯關(guān)系，原文提到在這個地方發(fā)現(xiàn)猛犸象，是為了支持該理C本身錯誤。 正確選項C原文對應(yīng)第三段SoIthinkitisquitelikelythatthose13mammothinSouthernCaliforniaalsodiedofnaturecauses,andthatClevispeoplesimplytookadvantageofthesituation.soI就是說，老師并不覺得是這些人的捕殺導(dǎo)致了大動物的，因此對應(yīng)C選項。難點在于Cbeplishedat是這些人導(dǎo)致了動物的，正好相反。toolsforprocessingmeat,很多學(xué)生在聽不懂的時候原文對應(yīng)內(nèi)容Ataroundof11500B.C.E.,theworldwascomingoutoftheiceage.Andwiththatcameincreasedseasonality,thatis,thesummersbecamewarmer,andthewintersactuallybecamecolder.Thisextremeshiftswouldhaveputalotofstressonthebodiesofanimalsthatwereusedtoamoremoderaterangeoftemperatures.Butthemostimportantimpactofthisincreasedseasonalitymayverywellhavebeenitseffectonthedistributionofplants.正確選項分析butthemost原文提到冰川時代結(jié)束之后季節(jié)性更強(qiáng)，夏天更熱了，冬天更冷了。所以對應(yīng)B。第二Cfood，同時在此段更具體的解釋中提到冰川時代之后植物多樣性減少，從而導(dǎo)致植物的。但是對于做對該題來說更具體的解釋其實對于選C沒有太大意義，只需要聽到兩個方面的并列的影響即可。A.D.新表明氣候變化并不像科學(xué)家以前一度認(rèn)為的那樣那么和劇烈Again,wehavewhatatfirstseemslikeaprettyattractivetheory,butthen,howdoyouexplainthefactthatthishashappenedbefore?Youknow,globalcoolingfollowedbyglobalwarming,andtherewasnoextinction該句意思是之前氣候變化也發(fā)生過，首先特別冷，之后全球變暖，但當(dāng)時并沒有發(fā)生動物的情況。也就是說大動物在之前的氣候變化里生存下來了。所以對應(yīng)B選項。該題考查老師對該理論的態(tài)度，考點角度也有明確的信號詞，但是句子比較難聽懂。Onethinghefoundwasthathumansdidnotnecessarilyhavetokilltheseanimalsingreatnumbersinordertonudgethemtowardtheextinction.That'sbecauseverylargeanimalshaveaslowrateofreproduction,soallyouhavetodoisremoveafewyoungfemalesfromtheherdsandyoucan,fairlyquickly,significantlyreducethepopulation.Andthenhecameupwithascenariothatcombinedsomehuntingbyhumanswithsomeenvironmentalstress,and...bang.Thesimulatedmammothwereextinctwithindecades.信號詞：onething…；and物，因為他們的率比較低，只需要殺死一些雌性就可以了。