如图为人体内血液循环示意图据图回答1正常情况下心脏内的血液按“心房→心室→动脉→ 的方�流动而不能倒流原因是有 和 起 Template




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Try and sketch some of thesePrincess, Lawn, Tower, Peg leg, Scale, Peninsula, Bow and arrow, Mustard, Poker, Swinging bridge, view more ideas


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tomski如图为人体内血液循环示意图据图回答1正常情况下心脏内的血液按“心房→心室→动脉→ 的方�流动而不能倒流原因是有 和 coloring