负责定义数据库中信息的内容和结构,定义数据的安全性和完整性约束条件,监控数据库的使用和运行等工作的人员是
A.系统分析员
B.系统设计员
C.数据库管理员
D.应用程序员
参考答案:C
Passage OneQuestions 26 to 28 are based on the passage you have just heard.
A.The fastest person to cross the Atlantic.
B.The youngest person to row an ocean alone.
C.The person who makes the fastest west-to-east crossing.
D.The person who stays on the ocean for the longest time.
温度补偿的电压值通常为温度每升高/降低1℃,每只电池电压升高/降低3mV,即在一定温度区间内电压-温度关系是按一定比例关系补偿的。