关井控制井口的原则是什么?
参考答案:
最大关井套压,不能超过下面三个极限值中的最小值:
1、口装置的额定工作压力;
2、套管柱抗内压强度的80%;
3、地层破裂压力。
铜质沉着症
A pregnant client is taking folic acid. During prenatal teaching, which of the following foods would the nurse recommend as high in folic acid()
A. Egg yolks.
B. Fruit.
C. Bread.
D. Milk.