C#多级展开菜单

半透明的C#圆形状时钟，圆形电子表，指针风格的电子时钟特效，基于VS2008编写，本程序看上去是一个时钟程序，实则很多技巧来源于窗体编程，比如设置窗体透明度、是否显示电子表边框、开启自启动、在托盘显示图标、窗体置顶、自动隐藏等，对学习C#的窗体编程有不小的帮助。

应用背景一个计算器应用程序。可以计算加减乘除，具有简单的界面，帮助初学C++的同学熟练掌握Visual C++ MFC的框架构建等。关键技术Visual C++ MFC的框架构建，对话框的创建与设计，文本框获取输入信息，常用控件的操作，添加变量，编写函数等。

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新编剑桥商务英语（BEC）（中级）学生用书之听力-New Business English (BEC) (Intermediate) Student Book of Listening

This specification defines the Audio Codec ‘97 (AC ‘97) Architecture and Digital Interface (AC-link) specifically designed for implementing audio and modem I/O functionality in mainstream PC systems. This specification does not explicitly define the companion AC ‘97 Digital Controller component (sometimes referred to or abbreviated as DC ‘97), which typically varies in features and implementation, but is AC ‘97 compliant with this specification.-This specification defines the Audio Codec

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35kv变电站设计，部分说明图-35kv substation design, part of Figure

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