下列对根瘤菌的叙述正确的是 A.根瘤菌在植物根外也能固氮 b.根瘤菌离开植物根系不能存活 c.土壤淹水时根瘤菌固氮量减� D.大豆 Template




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tomski下列对根瘤菌的叙述正确的是 a.根瘤菌在植物根外也能固氮 b.根瘤菌离开植物根系不能存活 coloring