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练习:登录界面内容:窗体事件、鼠标事件、键盘事件、Dialog对话框题目:使用 Java 的 AWT 技术,按如下要求完成程序设计。一、程序启动,创建并显示一个登录程序主界面,主界面能正常关闭,主界面包括如下内容: （）; 三、“验证按钮”,点击时,自动验证输入的用户名和密码是否只含有数字或字母。如果验证正确,弹出提示框“输入格式正确”; 如果验证不成功,弹出提示框,提示内容为具体的错误信息。四、“清空按钮”,点击时,自动清空“用户名输入框”和“密码输入框”中的内容。参考如下:

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What made British people happy when Ann Jones won the women’s singles in 19697[A] There weWhat made British people happy when Ann Jones won the women’s singles in 19697 [A] There were her family members among the people who watched the match. [B] She was the first member of the club who ever won a game. [C] She was the first British winner for a long time. [D] She was beautifully dressed.

Like the doubles, singles is also a game of all-out aggression.（）

下列图四幅图中，可以说明镜面反射的图是（）

教师的职业认同往往会影响到职业适应。教师的职业认同往往会影响到职业适应。