A. 正确 B. 错误
A. 创缘常伴皮下出血。 B. 创壁光滑,有时可见瓣状创。 C. 创腔呈囊状 D. 创壁常见组织间桥
A. Yes, I am Clinton. B. Thank you for calling me. C. This is Clinton speaking. D. Yes, who are you?