血液与组织细胞之间进行物质交换的场所是( )
A:心脏
B:动脉
C:静脉
D:毛细血管
下列属于先天性行为的是( )
He __________ goes to Tai’an, so he wants to go there.
—Could you tell me _______, Mary?—Of course. Go straight, and you’ll see it on your right.