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　　2.出?(chu)門?(men)做??(zuo)好??(hao)防??(fang)護(hù)??(hu)　　風(fēng)??(feng)媒??(mei)花??(hua)粉?(fen)指??(zhi)借??(jie)助??(zhu)風(fēng)??(feng)力??(li)傳??(chuan)播??(bo)授??(shou)粉??(fen)的??(de)花??(hua)粉??(fen)??，一??(yi)般??(ban)花??(hua)粉??(fen)粒?(li)小?(xiao)、質(zhì)?(zhi)輕??(qing)、量??(liang)多??(duo)??，如??(ru)柏??(bai)樹??(shu)、楊??(yang)樹??(shu)、柳??(liu)樹??(shu)、樺??(hua)樹??(shu)、梧??(wu)桐??(tong)等??(deng)；它??(ta)的??(de)特??(te)點(diǎn)??(dian)是?(shi)花??(hua)型?(xing)較??(jiao)小??(xiao)、色??(se)淺??(qian)、無??(wu)香??(xiang)味??(wei)??，數(shù)??(shu)量?(liang)多??(duo)??，花??(hua)粉??(fen)傳??(chuan)播??(bo)面??(mian)積?(ji)很??(hen)廣??(guang)、在??(zai)空?(kong)氣??(qi)中??(zhong)停??(ting)留??(liu)時(shí)??(shi)間??(jian)長(zhǎng)??(chang)?。??GFNIUUCOGDqibao666888　　2.chu ?(chu)men ?(men)zuo ??(zuo)hao ??(hao)fang ??(fang)hu ??(hu)　　feng ??(feng)mei ??(mei)hua ??(hua)fen ?(fen)zhi ??(zhi)jie ??(jie)zhu ??(zhu)feng ??(feng)li ??(li)chuan ??(chuan)bo ??(bo)shou ??(shou)fen ??(fen)de ??(de)hua ??(hua)fen ??(fen)??，yi ??(yi)ban ??(ban)hua ??(hua)fen ??(fen)li ?(li)xiao ?(xiao)、zhi ?(zhi)qing ??(qing)、liang ??(liang)duo ??(duo)??，ru ??(ru)bai ??(bai)shu ??(shu)、yang ??(yang)shu ??(shu)、liu ??(liu)shu ??(shu)、hua ??(hua)shu ??(shu)、wu ??(wu)tong ??(tong)deng ??(deng)；ta ??(ta)de ??(de)te ??(te)dian ??(dian)shi ?(shi)hua ??(hua)xing ?(xing)jiao ??(jiao)xiao ??(xiao)、se ??(se)qian ??(qian)、wu ??(wu)xiang ??(xiang)wei ??(wei)??，shu ??(shu)liang ?(liang)duo ??(duo)??，hua ??(hua)fen ??(fen)chuan ??(chuan)bo ??(bo)mian ??(mian)ji ?(ji)hen ??(hen)guang ??(guang)、zai ??(zai)kong ?(kong)qi ??(qi)zhong ??(zhong)ting ??(ting)liu ??(liu)shi ??(shi)jian ??(jian)chang ??(chang)?。??