首选用于治疗疮疡阳证的外用药物是
A．阳和油膏
B．冲和油膏
C．玉露油膏
D．生肌白玉膏
E．回阳玉龙膏
参考答案：C
The blood-gas barrier in alveoli may include each of the following EXCEPT
A．cytoplasm of a type Ⅱpneumocyte
B．basal lamina of type Ⅰalveolar cells
C．cytoplasm of a type Ⅰpneumocyte
D．endothelium of a continuous capillary
E．basal lamina of an endothelial cell
七氟丙烷灭火系统启动瓶组里充装氮气，当发生火灾，启动瓶组接到指令时启动气体打开（），释放灭火剂。
A.选择阀和背压阀
B.瓶头控制阀和背压阀
C.选择阀和瓶头控制阀
D.背压阀和自动控制阀
