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搜题
【单选题】
以下不属于生态系统中物质循环的途径的是哪一项?A.
环境-生产者-环境
B.
环境-消费者-环境
C.
环境-生产者-消费者-生产者-环境
D.
环境-分解者-环境
拍照语音搜题，微信中搜索"皮皮学"使用
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皮皮学刷刷变学霸
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