本软件用delphi5+sql server2000开发，xp下测试通过。
超级用户可以输入修改学习内容，题库内容。其他用户进入只能学习其中内容或者做测试题。测试题主要包括：选择、填空、判断三类，出题类型包括1.章节课后题 2.系统随机选题两大类。测试完成后可以进行判断对错(评分)，及时解答等功能；如果自己机器上面没有安装数据库sql server,则进入演示版。如果哪位朋友需要这方面的资料（源码）可以联系QQ：34636908(注明要求，否则本QQ号不随意加人)。
The software used delphi5+ sql server2000 development, xp under test. Super-user can enter modified learning content, content questions. Other users can only enter the study or to do one of the content of test questions. Tests include: selection, fill in the blank, determine the three categories, questions types include 1. Chapters after title 2. Systematic random selection two broad categories. Upon completion of the test can be judged right or wrong (score), timely answers and other functions if their machine is not installed above the database sql server, then enter the demo. Friend, if any required information in this regard (source) can contact QQ: 34636908 (specify the requirements, otherwise the No. QQ not add people at random). (2009-03-23, Delphi, 457KB, 下载111次)
用户名：SYSTEM
密码：空
第一次运行请先恢复数据库 DATABASE 到SQL服务器，也可在桌面建立应用程序的快捷方式加-restore参数进行自动恢复。
压缩包的安装包目录里面是旧的版本，切勿将其中的数据库恢复。
程序使用的各控件在DELPHIBOX里均有下载，EHLIB、ETree等
可以对瓶装液化器的钢瓶进行管理，收取租金、押金，到期提醒，并可以对液化气的进、销、存进行管理，如须进行库存管理，请直接联系本作者，有正式版。
导航图控制，方便易懂。
多帐户付款管理，更灵活避SHUI。
User Name: SYSTEM Password: empty the first time you run to restore DATABASE database to SQL server, can also be established on the desktop application shortcut plus-restore parameters of automatic recovery. Compression package directory inside the installation package is the older version, not to one of database recovery. Procedures used in the control in both DELPHIBOX download, EHLIB, ETree such as bottled liquefied can s cylinder management, rent collection, deposit, due reminders, and can feed on the liquefied gas, sales, deposit management, such as subject to inventory management, please contact the authors, there is a formal version. Navigation control, convenient and understandable. Multi-account management, more flexible to avoid SHUI. (2008-12-30, Delphi, 6834KB, 下载21次)