不同的测量范围的1151差压变送器是由于测量膜片的（）。
A. 厚度不同
B. 材料不同
C. 直径不同
D. 数量不同
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GSM、WCDMA平台每次进行版本升级时候需要手动安装更新程序。
A. 正确
B. 错误
You need to define an authentication system for the main office database administrators. The setup should require the minimum amount of administrative effort. The authentication environment must fulfill the company’s security requirements.What should you do？（）
A. Create a SQL Server login with Windows Authentication for each main office database administrator.Add all of these logins to the db_owner role in each database.
B. Create a SQL Server login with SQL Server Authentication for each main office database administrator.Add all of these logins to the sysadmin role.
Create a Windows global group named DBAdmins. Add each main office database administrator’s Windows user account to the Windows DBAdmins group.Create a SQL Server login with Windows Authentication for the group.Add the group to the serveradmin fixed server role.
D. Add each main office database administrator’s Windows user account to the Windows SQLManagersgroup.
某患者，上颌6缺失，上颌7近中倾斜移位，余牙正常。其固定义齿设计应采用（）
A. 特殊固定桥
B. 复合固定桥
C. 半固定桥
D. 单端固定桥
E. 双端固定桥
室外温度较低时启动后要给发动机加温。
A. 正确
B. 错误
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