如图是家鸽�吸系统的组成下列有关其说法正确的是 A.3和2都能进行气体交换b.2里分布着丰富的毛细血管c.3所示的结构和青蛙的皮肤蚯蚓 Template




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tomski如图是家鸽�吸系统的组成下列有关其说法正确的是 a.3和2都能进行气体交换b.2里分布着丰富的毛细血管c.3所示的结构和青蛙的皮肤蚯蚓 coloring