2．软体动物的贝壳和节肢动物的外骨骼共同的作用是 A．防止水分蒸�b．保护c．作为运动器官的支架d．限制身体的不断长大——青夏教育精英家教�—— Sketch Coloring Page

2．软体动物的贝壳和节肢动物的外骨骼共同的作用是 A．防止水分蒸�b．保护c．作为运动器官的支架d．限制身体的不断长大——青夏教育精英家教�—— Template

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