某同学在显微镜下观察到�鱼尾鳍内血液流动的方�请根据各血管内血液流动的方�判断甲乙丙三条血管各属于 A.小静脉毛细血管小动脉b Template




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tomski某同学在显微镜下观察到�鱼尾鳍内血液流动的方�请根据各血管内血液流动的方�判断甲乙丙三条血管各属于 a.小静脉毛细血管小动脉b coloring