我先用shutdown normal关闭了数据库，可是它很慢，几十分钟过去了纹丝不动，又打不开，后来用shutdown abort解决的。
C:\>sqlplus/nolog
SQL> conn sys/ as sysdba
输入口令:
已连接到空闲例程。
SQL> startup
ORA-10997: another startup/shutdown operation of this instance inprogress
ORA-09968: unable to lock file
SQL> shutdown immediate
ORA-24324: 未初始化服务句柄
ORA-24323: 不允许此值
ORA-01090: shutdown in progress - connection is not permitted
SQL> startup nomount
ORA-10997: another startup/shutdown operation of this instance inprogress
SQL> startup mount
ORA-10997: another startup/shutdown operation of this instance inprogress
SQL> shutdown abort
ORACLE 例程已经关闭。
SQL> startup
ORACLE 例程已经启动。
Total System Global Area 167772160 bytes
Fixed Size 1247900 bytes
Variable Size 79693156 bytes
Database Buffers 83886080 bytes
Redo Buffers 2945024 bytes
数据库装载完毕。
数据库已经打开。
SQL>