The nurse is caring for a child with leukemi

a. Which of the following should the nurse priority pay more attention toA. Preventing injury.B. Monitoring the child’s platelet count.C. Monitoring the child’s temperature.D. Encouraging increased fluid intak

关于心脏杂音的形成机制，下列不正确的是（）

A.血流通过狭窄或关闭不全的瓣膜口产生漩涡可出现杂音

B.血流速度越慢，漩涡越易产生，杂音越强

C.血流通过异常扩大或狭窄的血管腔产生漩涡

D. * * 肌或腱索断裂，断端在心腔内摆动产生涡流

E.心脏内发生异常通道，产生分流，使血流加速而产生杂音