- 问题详情:Farmersandgardenershavelongusedgreenhousestoextendthegrowingseasonincoldweather.Now,hoophousesaregainingpopularity.Somehoophousesarerounded;othersareshapedmorelikeatraditionalhouse.Ahoophouseisbasicallyametalframecoveredwithplasticorotherall...
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