A:still
B:even
C:again
D:only
如图为人体某处的血管结构和血流方向示意图.下列有关叙述正确的是( )
—Yes, I got them from my parents as a birthday present.
“美人鱼”的学名儒艮,母兽给幼兽喂奶时常浮出水面,类似人类的哺乳,你判断美人鱼属于( )