DSS的基本特征包括哪些？（） ["强调支持的概念","面向决策者","模型和用户共同驱动；强调交互式的处理方式","主要针对半结构化的决策问题"]
二级保养以（）为主实施。 ["专业维修人员","安全管理人员","操作人员","调动人员"]
学意境所追寻的意境效果，其意境往往被分为“实境”和“虚境”，而意境的塑造，应该做到（）。 ["虚中求实","虚实相生","虚无缥缈","实实在在"]
RIP and OSPF are configured on the routers as shown in the exhibit. R2 is configured with a two-way redistribution between RIP and OSPF domains. All routers can ping each other， but R1cannot see any of the OSPF routes in its routing table. What could the problem be？（） ["OSPF and RIP use the same major network 172.16.0.0. Therefore， the keywordsubnets is notrequired to redistribute protocols into OSPF","Because OSPF has a longer mask for the same major network than RIP and because RIPversion 1 is being used， none of the routes learned from OSPF will be advertised into RIP","The metric for the OSPF routes that are redistributed into RIP is too low， a fact that preventsOSPF routes from being advertised into RIP","The process of redistribution of RIP into OSPF does not require any metric conversion， so thereis no need to define the metric using the default-metric command during the redistributio"]
辨伪通常采用哪些方法？
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