在急性肺水肿患者镇静治疗时,最有效的药物是
A.吗啡
B.利尿剂
C.氨茶碱
D.血管扩张剂
E.强心剂
参考答案:A
Immediately after a spontaneous rupture of the membranes, the nurse observes a loop of umbilical cord protruding from the vagina. What should the nurse do first
A.Administer oxygen.
B.Notify the physician.
C.Document the deceleration.
D.Elevate the hips on two pillows.
欲测定某溶液pH,要求精确到0.01pH单位,应选用的方法是()。
A.滴定法
B.比色法
C.电位计法
D.pH试纸法
E.电导法