23.下面关于氮循环的说法中正确的一项是 A.生物固氮过程就是通过固氮微生物把大气中的氮气转化成氨的过程 b.动物排出的含氮废物以及动植物 Template




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tomski23.下面关于氮循环的说法中正确的一项是 a.生物固氮过程就是通过固氮微生物把大气中的氮气转化成氨的过程 b.动物排出的含氮废物以及动植物 coloring