根据右面人体血液循环和气体交换示意图回答下列问题用字母和箭头表示出abek这四部分结构中血液流动的方� .图中由b到c 的循环途径 Template




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tomski根据右面人体血液循环和气体交换示意图回答下列问题用字母和箭头表示出abek这四部分结构中血液流动的方� .图中由b到c 的循环途径 coloring