下图是研究植物�性运动的实验示意图实验结果不能说明的是a.根具有�重力性茎具有负�重力性b.生长素对植物的作用具有二重性c.根和茎的�性 Template




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tomski下图是研究植物�性运动的实验示意图实验结果不能说明的是a.根具有�重力性茎具有负�重力性b.生长素对植物的作用具有二重性c.根和茎的�性 coloring