如图是人体部分器官系统及有关物质的代谢关系示意其中的abcdefg分别表示不同的物质.请分析回答1若a为从消化系统进入血液的 Template




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tomski如图是人体部分器官系统及有关物质的代谢关系示意其中的abcdefg分别表示不同的物质.请分析回答1若a为从消化系统进入血液的 coloring