下图为鲫鱼的内部结构示意图据图回答 1与2相通的血管是 里面所流的血液为 2当由口进入的水流经4时水的成分——青夏教育 Template




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tomski下图为鲫鱼的内部结构示意图据图回答 1与2相通的血管是 里面所流的血液为 coloring