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【多选题】
国家网信部门应当统筹协调有关部门对关键信息基础设施的安全保护采取下() 措施。A.
对网络安全事件的应急处置与网络功能的恢复等，提供技术支持和协助
B.
促进有关部门、关键信息基础设施的运营者以及有关研究机构、网络安全服务机构等之间网络安全信息共享
C.
对关键信息基础设施的安全风险进行抽查检测，提出改进措施，必要时可以委托网络安全机构进行网络安全风险评估
D.
定期组织关键信息基础设施的运营者进行网络安全应急演练，提高应对网络安全事件的水平和协同配合的能力
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