Data transfer is slow between the source and destination. The quality of service requested by the transport layer in the OSI reference model is not being maintained. To fix this issue, at which layer should the troubleshooting process begin?（） [" presentation"," session"," transport"," network"," physical"]
简述污染水环境的修复目标和原则。
OSPF路由协议在多路访问的网络中，需要选择DR和BDR，那么其在那种状态进行了DR和BDR的选举？（） ["Init状态","2way状态","Exstart状态","Exchange状态"]
心境是（）的情绪状态。 ["短暂的，爆发式的","理性的，深沉的","微弱持久的，具有渲染性的","伴随感觉产生的"]
票据丧失后，既可向付款人（代理付款人）本人挂失止付，也可由当事人登报或在电视，广播上声明挂失，二者同样具有法律效力。
杂基
