A. 显示器 B. 数码相机 C. 扫描仪 D. 打印机
A. 入情入理,情理交融 B. 区别情况,对症下药 C. 表扬为主,启发自觉 D. 坚持原则,扶正祛邪
A. for the release of air B. for the release of water C. in order to the release of air D. because the release of air