在生态系统中物质是循环的.生产者能把二氧化碳和水这些无机物制造成有机物下列 能把有机物再转变成二氧化碳和水等返回无机环境中.a.生产者 Template




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tomski在生态系统中物质是循环的.生产者能把二氧化碳和水这些无机物制造成有机物下列 能把有机物再转变成二氧化碳和水等返回无机环境中.a.生产者 coloring