下列（）操作属于文件管理模块。
A.确定文件内容所在的物理块号
B.分配缓冲区
C.释放缓冲区
D.修改读写指针
E.I/O中断处理
参考答案：A, D
根据首字母或中文提示在答题卡上填写完整的单词
1. We were c______ about him when we heard of the accident.
2. They talked about it for hours. F_______, they decided not to go.
3. Here are Daphne and David; the _______ (后者) is my brother.
4. She's gardening _______ (在户外)now.
5. Steve p______ walking to driving,for he thinks it's a better way to exercise.
导游讲解的停顿一般分为（）。
A、生理停顿
B、心理停顿
C、语法停顿
D、强调停顿
