Y/△-11接线的变压器,二次侧线电压超前一次侧线电压的角度差是()。
A.330°
B.30°
C.300°
参考答案:B
The nurse noticed that an 8-month-old child’s posterior fontanel is slightly open. Which of the following should the nurse do next
A. Check the child’s head circumference.B. Question the mother about the child’s delivery.C. Schedule an X-ray of the child’s head.D. Document this as a normal findin
以下那种方法对提高即时成活率(没有脱发期)。有显著帮助().
A、缩短毛囊离体时间
B、将培养皿置放在冰块上
C、种植时使用钝性损伤最小的器械
C、分离时只使用切的动作,避免刮,扯等动作。