医疗机构从业人员分为几个类别（）。
A.3个
B.4个
C.5个
D.6个
E.7个
参考答案：D
--Who is the old man talking with your teacher?
---I don’t know. I him before.
A．was never seeing
B．had never seen
C．never saw
D．wouldn’t see
下列何项不属黄土汤的功用（）
A.止血
B.益气
C.温阳
D.养血
E.健脾
