A man with a bleeding hand hurried in and asked, “Is there a hospital around ________I can get my hand treated.

A．that

B．which

C．what

D．where

茶碱类治疗支气管哮喘的作用机制是

A．阻断迷走神经
B．抑制磷酸二酯酶
C．激活腺苷酸环化酶
D．保护肥大细胞溶酶体膜
E．使封闭抗体增加