151 Sources for data on activity durations and resource requirements can be gathered from which of the following:A. Past project records (historical data)B. Commercial techniques (standard practices, rules of thumb)C. Past project team members knowledge (experience, oldtimers)D. All of the aboveE. A and C only
151 Sources for data on activity durations and resource requirements can be gathered from which of the following:
A. Past project records (historical data)
B. Commercial techniques (standard practices, rules of thumb)
C. Past project team members knowledge (experience, oldtimers)
D. All of the above
E. A and C only
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给出在车间“W1”或“W2”工作,并且工资大于3000的职工姓名,正确的命令是A.SELECT姓名FROM车间 WHERE 工资>3000 AND 车间=“W1”OR车间=“W2”B.SELECT 姓名 FROM 车间 WHERE 工资>3000 AND (车间=“W1”OR车间=“W2”)C.SELECT 姓名 FROM 车间; WHERE 工资>3000 OR 车间=“W1”OR车间=“W2”D.SELECT姓名FROM车间; WHERE 工资>3000 AND(车间=“W1”OR车间=“W2”)
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