静态监听实例的状态为UNKNOWN，测试连接成功
[c:\~]$ sqlplus zx/zx@192.168.56.2:2521/orcl
SQL*Plus: Release 12.1.0.1.0 Production on 星期六 1月 7 20:40:03 2017
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连接到:
Oracle Database 11g Enterprise Edition Release 11.2.0.4.0 - 64bit Production
With the Partitioning, OLAP, Data Mining and Real Application Testing options
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