始图是长劲鹿的进化示意图.请回答下列问题.1表示通过生存斗争适者生存不适者淘汰的是aa图.2当自然环境恶化时具有有利有利变异的 Template




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tomski始图是长劲鹿的进化示意图.请回答下列问题.1表示通过生存斗争适者生存不适者淘汰的是aa图.2当自然环境恶化时具有有利有利变异的 coloring