数据管理技术经历了人工处理阶段、人工文件系统和数据库系统、【 】和【 】5个发展阶段。
参考答案：交互式数据库系统
砂浆立方体抗压强度计算应精确至（）。
A female neonate delivered by elective cesarean birth to a 25-year-old mother weighs 3,265g (7 lb, 3 oz). The nurse places the neonate under the warmer unit. In addition to routine assessments, the nurse should closely monitor this neonate for which of the following（）
A. Temperature instability due to type of birth.
B. Respiratory distress due to lack of contractions.
C. Signs of acrocyanosis.
D. Unstable blood sugars.
