新生儿复苏正压通气时通气频率为多少为宜。()
A、30-40次/min
B、(40-60)次/min
C、40-50次/min
D、50-60次/min
参考答案:B
How was it that we were able to _____ untold hardships, overcome the most difficult and dangerous
conditions and bring the revolution to victory? [ ]
A. survive on
B. survive from
C. survive
D. surviving
灭菌工作室对压力蒸汽灭菌器的灭菌效果应定期进行检查。运用化学指示剂法,检查频率是()。
A.每批1次
B.每季度1次
C.每月1次
D.每周一次
E.每日一次