按临床表现与组织病理改变不同，湿疹可分为（）、（）、（）及三型。
参考答案：急性；亚急性；慢性
有地图指向标的地图，其指向标的箭头指示的方向一般为[ ]
A、东向
B、南向
C、西向
D、北向
____ the chat room ten minutes ago, you would have known what we were talking about!
[ ]
A. Had you joined
B. If you joined
C. If you had taken part in
D. Had you participated
