第21题: [单项选择]What is the man’s sister doing now A. She is visiting London. B. She is visiting New York. C. She is visiting Shanghai. 参考答案:B 答案解析:[听力原文] F: Have you heard from your sister yet M: Yes, I got a letter from her yesterday. She
第32题: [单项选择]下列各项说法中错误的是( )。 A. Swing构件支持双缓冲区,编写程序的时候不需要重写有关的代码 B. AWT构件支持双缓冲区,编写程序的时候不需要重写有关的代码 C. Swing构件支持在按钮构件上同时添加图标和文字 D. AWT构件不支持在按钮构件上添加图标 参考答案:B 答案解析:[解析] Swing构件支持双缓冲区, JComponent构件默认双缓冲区,但是AWT构件不支持,需要重写代码。