试述城市人口问题的主要表现及解决对策。
Which four are correct guidelines for naming database tables? （） Must begin with either a number or a letter.。 Must be 1-30 characters long.。 Should not be an Oracle Server reserved word.。 Must contain only A-Z, a-z, 0-+, _, *, and #.。 Must contain only A-Z, a-z, 0-9, _, $, and #.。 Must begin with a letter.。
In a scale-out environment，what is a benefit of running DB2 pureScale compared to other solutions？（） Provides a highly available cluster of Power Systems enabling near linear scalability and disaster recovery across different sites.。 Incorporates a hardware locking mechanism which resembles the Parallel Sysplex on the mainframe， delivering performance and scalability.。 Enables near linear scalability by partitioning and clustering the database across multiple nodes， and adding nodes dynamically when needed.。 Provides scalability by employing a highly available cluster of servers interconnected by an Infiniband network and a central locking mechanism.。
病毒的化学组成有？整个病毒分哪两部？完整的具有感染力的病毒体叫？
A network for a two-node cluster has been planned. The network administrator has explained that the networkdoes not support gratuitous ARP. Which of the following steps will ensure that clients are able to connect tothe cluster after a failover takes place？（） Implement heartbeating over IP aliases。 Implement persistent service IP addresses。 Implement IPAT aliasing with hardware address takeover （HWAT）。 Implement IPAT replacement with hardware address takeover （HWAT）。
Which statement about Automatic Memory Management with Oracle 11g is true？（）
