新技术、新工艺、新设备、新材料的应用，由专业技术负责人组织技术论证，按规定程序报批，总结应用效果，并存档。
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All servers on your network run Windows Server 2008 R2. You deploy Remote Desktop Services （RDS）.You are configuring the Remote Desktop Session Host （RD Session Host） role service. You need to ensure that authentication occurs before the Remote Desktop Connection logon screen appears. What should you do？（）
A. In the RD Session Host Configuration tool， select the Allow connections only from computers running Remote Desktop with Network Level Authentication option.
B. In the RD Session Host Configuration tool， select the Allow connections from computers running any version of Remote Desktop option.
C. In the Group Policy Object Editor， configure the Set TS Gateway authentication method setting to Use smart card.
D. In the Group Policy Object Editor， configure the Set TS Gateway authentication method setting to Use locally logged-on credentials.
根据《国家电网公司营销安全风险防范与管理规范》规定，以下哪些原因会导致引起的客户安全用电事故由供电企业承担相应的法律责任等风险（）。
A. 未履行用电检查责任
B. 产权归属与运行维护责任不清晰
C. 合同未签或过期
D. 停限电操作不规范
钨极氩弧焊时，高镍合金钢的坡口约为（）。
A. 45°
B. 60°
C. 80°
D. 90°
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