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　　(內(nèi)??(nei)容??(rong)來??(lai)源??(yuan) 北??(bei)京??(jing)市??(shi)疾??(ji)病??(bing)預(yù)??(yu)防??(fang)控?(kong)制??(zhi)中??(zhong)心?(xin))　　花??(hua)粉??(fen)主??(zhu)要??(yao)由??(you)植??(zhi)物??(wu)雄??(xiong)蕊??(rui)產(chǎn)??(chan)生??(sheng)?，是?(shi)附??(fu)著??(zhe)在?(zai)植??(zhi)物??(wu)雄?(xiong)蕊??(rui)上??(shang)的??(de)微??(wei)小??(xiao)孢??(bao)子??(zi)堆??(dui)?，根??(gen)據(jù)??(ju)傳??(chuan)播??(bo)方??(fang)式?(shi)不??(bu)同?(tong)?，可?(ke)將??(jiang)其?(qi)分??(fen)為??(wei)風(fēng)??(feng)媒??(mei)花??(hua)粉??(fen)和??(he)蟲??(chong)媒??(mei)花??(hua)粉?(fen)兩?(liang)類??(lei)?。?。