Me
My name is Li Hua. I am 8 years old. I like sports. I have lots of sports at weekends. I love play table tennis very much, and I like swimming, too. I have a big family. We all like each other.
波斯湾地区最丰富的矿产是( )
如图是人体呼吸系统组成示意图,请据图回答下列问题:
鱼类大多生活在水中,具有适应水生生活的特征。下列不是鱼类适应水生生活的形态结构特征是( )