[问答题] 简述计算机辅助教学的优点。

安全评价的依据和原则有哪些？ 煤气净化操作电捕焦油器运行时其顶部绝缘处温度必须在（）℃规定范围内。 ["20~40","40~60","60~80","80~100"] 市场因素是如何影响国际营销定价的？ 发绀 You develop a Web control. The Web control consists of labels and associated text boxes.You need to ensure that the Web control has both toolbox and visual designer support. What should you do?（） [" Add a Web Control Library project to your solution. Define a class that inherits from CompositeControl."," Add a Windows Control Library project to your solution. Define a class that inherits from UserControl."," Add a Web User Control to your project. Define a class that inherits from UserControl."," Add a Mobile Web User Control to your project. Define a class that inherits from MobileUserControl."] 简述计算机辅助教学的优点。