访问磁盘时,当磁头到达指定磁道后,必须等待所需要的扇区到达读写头下,这一部分时间称为______时间。
参考答案:延迟
—I'm sorry I'm calling you so late.
—_____.
A. No problem
B. You're welcome
C. That's okay
D. I'm all right
书面表达(满分25分)
假如你是李华, 听说你的同学Tom吸烟, 给他写一封建议信,包括以下内容:
1. 吸烟对自己和周围的同学、老师都有害,影响健康。
2. 吸烟浪费钱和时间,中学生应该珍惜时间努力学习。
3. 已经吸烟成瘾的要下决心戒烟。
4. 当你因不吸烟而感到焦虑和紧张时,做深呼吸或做一些放松活动。
5. 把注意力转移到学习上。
Dear Tom,
I’m sorry to hear that you have got into the habit of smoking. ________________
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Yours,
Li Hua