对下图的解释说明正确的是 A.图中最�包含8条食物链 B.该食物�中最长的一条食物链包含4个营养级 C.蛇和鹰既存在捕食关系又存在竞争关系 Template




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tomski对下图的解释说明正确的是 a.图中最�包含8条食物链 b.该食物�中最长的一条食物链包含4个营养级 coloring