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如何绘制贯人阻力与时间之间的关系曲线并确定混凝土拌合物的初凝和终凝时间？

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员工不愿和管理者一起制定可以实现而具有挑战性的目标，其根本原因主要是（）

A. 保护自身利益
B. 个性
C. 能力
D. 企业文化是自私和压迫的

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宝瓶座δ南流星雨

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自由锻件上可以有锥体或斜面结构。

A. 正确
B. 错误

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You are the administrator of a Microsoft Windows Server 2003 computer named Server1. SQL Server 2005 is installed on Server1 to host a database named MedDB. The MedDB database serves as the backend database for a new client/server application named MedDATA. Installation of the MedDATA application creates the database schema， application roles， and administrative accounts. It also sets all of the default permissions. You need to establish a permissions baseline for all objects in the MedDB database. What should you do？（）

A. Use the SQL Server 2005 Management Studio to review the permissions of the default database objects.
B. Query the sys.server_permissions table on Server1.
C. Execute the sp_helplogins system stored procedure for each of the default users that the MedDATA application creates.
D. Query the sys.database_permissions and sys.database_principals tables in the MedDB database.

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