A：R基为﹣CH3和﹣C3H5O2的二肽分子中，H的数目为12
B：脂肪既是细胞内的良好的储能物质，又是构成细胞膜的重要成分
C：细胞中大多数无机盐以化合态的形式存在
D：核糖和脱氧核糖是核酸的组成成分
-- It is reported that many wild animals in the world are _______ because of human behavior.
-- We must do something to stop people from hunting and selling these animals.
