如图是某生态系统中的食物�简图图中a F分别表示不同种类的生物.请据图回答1此生态系统中的a属于生产者 .在食物�中不含生态系统成份中 Template




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tomski如图是某生态系统中的食物�简图图中a f分别表示不同种类的生物.请据图回答1此生态系统中的a属于生产者 .在食物�中不含生态系统成份中 coloring