A series of examples of mathematical open -end problems taught in recent experiment are introduced. The significance and structure of open-end problems are also analysed.
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这就是为什么我不喜欢选择题的原因了，只有开放式的作文式问答题才能真正评估学习者的能力。
That's why I do not favor multiple-choice questions at all, and only open-ended essay questions can assess one's real ability in his/her areas of study.
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