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2019年春高中生物专题5生态工程5.2生态工程的实例和发展前景课件新人教版选修3.pptx

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专题5 生态工程,专题5 生态工程,多级循环,沼气工程,利用,水土流失,保土蓄水,九子登科,荒漠化,水土保持,调节区域气候,排水和围垦,工程和生物,自然演替,生态系统,城市生态分区,资源化,人工生态工程,太阳能,温度,大气和海洋,CO2,O2,人,自然,自然生态系统,生态环境,标准化,高科技含量,中国生态农业,环境容纳量,分层,S,生产者的光合作用,物质循环再生原理,生态效益,经济效益,植被破坏,土地荒漠化严重,

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