第21题: [单项选择]在Windows 98中,下列哪一种软件组件为应用程序提供了一种极其方便的途径去控 制各种多媒体设备,使得多媒体设备的控制操作与特定的硬件无关 A. GDI B. OpenGL C. MCI D. VFW 参考答案:C 答案解析:数据独立性是指应用程序与数据之间相互独立、互不影响。数据独立性包括物理独立性和逻辑独立性。物理独立性是指数据的物理结构发生改变时,数据的逻辑结构不必改变,从而应用程序不必改变;逻辑独立性是指当数据全局
第24题: [单项选择]Questions 15-18 are based on the following dialogue:Why did the woman have to stop playing in the volleyball game A. She had to go home. B. She was too tired to continue. C. She had to finish her schoolwork. D. She was thirsty. 参考答案:B 答案解析:对话中谈到打排球(play volleyball)的事情,而且女生说“I never realized how hard it is to run on sand.I couldn’t even ge