牛顿环实验中,平凸透镜和平玻璃板的折射率为n,其间为空气,后注射折射率为n’(n’>n)的透明液体,则反射光的干涉条纹将()。
A.变疏
B.变密
C.不变
D.不能确定
参考答案:B
Eight hours after catheterization, the postoperative client with abdominal hysterectomy has not voided. The client tells the nurse, "I don't think I can urinate. " What should the nurse do
A.Call and inform the surgeon of the client's status.
B.Administer additional pain medication.
C.Increase the client's fluid intake.
D.Assess the client's bladder.
请分析M800系统中保护系统在发生故障系统成功倒换后不能恢复的可能原因。