练习册

  • 练习册
  • 试题
    31． (1)D··········································································································· 2分 (2)水·········································································································· 2分 (3)B············································································································ 2分 载畜量······················································ 2分 (4)对人类有益···························································································· 2分 (5)B2和C2·································································································· 2分 分解者不能在短时间内将聚乙烯降解成无机物········································ 2分 (6)呼吸作用所消耗····················································································· 2分 光合作用产生的O2与呼吸消耗的O2······················································· 2分 【查看更多】

     

    题目列表(包括答案和解析)


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