难产的机制主要是（）
A.脾肾阳虚
B.气血虚弱
C.肝脾不调
D.气血失调
E.阴阳失调
参考答案：D
社会存在和发展的基础是
A．社会生产
B．社会积累
C．社会消费
D．社会交换
A client with a long history of ulcerative colitis takes sulfasalazine (Azulfidine) to control the condition. The nurse would anticipate the client to have which nutritional deficit that can occur as a result of taking this drug
A．Colbalamin.
B．Folic acid.
C．Niacin.
D．Iron.
