题型组合练(二十九) 阅读理解+阅读七选五Ⅰ.阅读理解阅读下列短文,从每题所给的A、B、C和D四个选项中,选出最佳选项。A(2019·太原高三模拟)Wheretherearehumans,,PasserDomesticus,theyaren',tinyandgrayandbrownbirdsarefoundoneverycontinentexceptAntarctica,hoppingaroundcities,pecking(啄)atleftoverfoodonsidewalks,,,,—measuredandtaggedthebirds,drewbloodsamples,,theysequencedthebirds''sgenesofmanyregionsappearedtohaveexperiencedpositiveselection,(淀粉)—'DNAwasfoundinaregionwithtwoknowngenes:oneislinkedtoskulldevelopmentandanotherhelpscreatetheamylase(淀粉酶),whichhelpsbreakdownstarchinhumans,
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