2. 外语
  3. A. a TV set and a computer B. the combination of broadcast and iPod C. amuse themselves D. voice and music E. help students stud

A. a TV set and a computer B. the combination of broadcast and iPod C. amuse themselves D. voice and music E. help students stud

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问题 A. a TV set and a computer
B. the combination of broadcast and iPod
C. amuse themselves
D. voice and music
E. help students study at home
F. a computer, a microphone, and some free software
Teachers have begun to record themselves teaching important concepts, which can______.
选项
答案E
解析 根据题干线索词teaching important concepts定位原文至第四段第三句。其意思是：一些老师将讲过的重要内容录制下来放到网上，这样有助于学生在家学习遇到困难时，进行在线学习。E选项help students study at home是对原文的同义改写，故E为正确答案。
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