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【单选题】
下列关于Oracle9i的事务提交描述，哪个是错误的（）。A.
可以使用commit命令的显式提交
B.
可以在SQLPLUS中执行“setautocommiton”的自动提交
C.
可以在发出DDL命令、程序终止、关闭数据库的隐式提交
D.
可以在SQL命令发出后完成提交
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【简答题】二进制数1100转换成十进制是(__),十六进制是(__)。
【简答题】A．Business courses have become popular. B．The school only offers business courses. C．The business school has a new program. D．The school has just started to offer business courses.
【单选题】Al sells his business to Dan and, as part of the agreement, promises not to engage in a business of the same kind within thirty miles for three years. Competition within thirty miles would hurt Dan's ...
A.
violates public policy, because it is part of the sale of a business.
B.
violates public policy, because it unreasonably restrains Al from competing.
C.
does not violate public policy, because it is no broader than necessary.
D.
does none of the above.
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