A:So curious were the couple
B:So curious the couple were
C:How curious the couple were
D:The couple were such curiou
下列实验现象描述正确的是( )
某校学生在对校园动物进行调查时,发现了以下几种动物,他们把这些动物分为甲类和乙类(如图所示),同学们的分类依据是( )
老年人易患骨质疏松症,是骨中缺少( )