The harmful effect of injecting chemical into tree on the xylem, bast, periderm and tree body was studied.

 
  • 摘要本文就樹(shù)干注入農藥,對木質(zhì)部、韌皮部及周皮和整個(gè)樹(shù)體是否產(chǎn)生不良影響做出評價(jià)。
今日熱詞
目錄 附錄 查詞歷史
国内精品美女A∨在线播放xuan