● 操作系统在 (46) 向用户提供目录管理类命令、文件操作类命令、文件管理类命令;操作系统在 (47) 向用户提供创建文件、撤销文件、打开文件、关闭文件、读文件、写文件等系统调用。 (46) A. 物理级 B. 操作级 C. 存储级 D. 编程级 (47) A. 物理级 B. 操作级 C. 存储级 D. 编程级
【简答题】改错。 Last month we bought our two-years-old daughter a little dog. There are not many children of her age where we lived, and we thought a dog would make her less alone. We were right. They play togeth...