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考研英语开班测试

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lofthefollowingcharacterizethewaynaturalselection\rstabilizedtheAustralianrabbitpopulationEXCEPT:[<]*\r[A]Themosttoxicvirusesdiedwiththeirhosts.\rfB]Thesurvivingrabbitswereincreasinglyimmunetothevirus.\r[C]Thedeclineofthemosquitopopulationcausedthespreadofthevirustodecline.>?\r459\r[DJRabbitswithspecificgeneticmake-upswerefavored.\r50.Accordingtoparagraph5.whichofthefollowingisNOTtrueoftherelationship\rbetweenthebulfshornacaciatreeandthePseudomyrmexants?[<]*\r[A]Antsdefendthehosttreesagainstthepredatoryactionsofinsectsandanimals.EvaluationWarning:ThedocumentwascreatedwithSpire.PDFfor.NET.\r[B]Theacaciatreesareavaluablesourceofnutritionfortheants.\r[C]Theantsenabletheacaciatreetoproduceitsownchemicaldefenses.! 08@\r[D]Theantsprotecttheacaciafromhavingtocompetewithsurroundingvegetation.

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