The first important exposition in the United States was held in Philadelphia in 1876.
A、exhibitionA
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In1974HenryAaronbrokeBabeRuth'smonumentallifetimerecordof714homeruns.
TheSalkvaccineisamajorfactorinthefighttoeradicatepolio.
Inliterature,caricatures讽刺画usuallycontainverbalexaggerationthroughwhichthewriterachievescomicandoftensatiric讽刺effects.
Thecontrolsofmostmodernairplanescanbeoperatedeithermanuallyorautomatically.
ThecompanyissuesanannualreporteveryMarch.
