关系模型中,实体完整性是指______。 A) 实体的所有属性不为空值 B) 实体的主属性不为控制 C) 实体的外码不为空值 D) 实体的非主属性不为空值
A.
B.
C.
D.
手机使用
分享
复制链接
新浪微博
分享QQ
微信扫一扫
微信内点击右上角“…”即可分享
反馈
参考答案:
举一反三
【单选题】S-246. A nurse is caring for a postpartum client who is being discharged with her newborn. Which discharge instruction should the nurse teach the client regarding newborn safety?
A.
Avoid using blanket rolls to position the infant in the car seat
B.
Place the baby in bed in the prone position while sleeping
C.
Place the infant's car seat in the back seat facing forward
D.
Use an infant sleep sack when the newborn is in the crib