海螵蛸的功效是（）
A.固精止带
B.收敛止血
C.制酸止痛
D.收湿敛疮
E.敛肺止汗
参考答案：A, B, C, D
与呼吸关系密切的内脏有
A．肝
B．心
C．脾
D．肺
E．肾
________work has been done to improve the people's living standard.[ ]
A. Many
B. A great many
C. A large number of
D. A great amount of
