下图表示蝌蚪的生长速率随种群密度增加的变化情况在同样的空间里个数由5增加到160图中曲线可以说明 A.食物短缺降低了蝌蚪存活率 B.每 Template




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tomski下图表示蝌蚪的生长速率随种群密度增加的变化情况在同样的空间里个数由5增加到160图中曲线可以说明 a.食物短缺降低了蝌蚪存活率 b.每 coloring