下列关于在粉管的叙述中不正确的是 A.一个花粉管中有一个精子 b.一个花粉管中有两个精子 C.输送精子进入胚囊 D.使受精作用�脱了水的限制 Template




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tomski下列关于在粉管的叙述中不正确的是 a.一个花粉管中有一个精子 b.一个花粉管中有两个精子 coloring