解惑“差差差轮滑”-知识课堂

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解惑“差差差轮滑”-知识课堂

北京：京港两差差差轮滑地青少年学习轨道交通知识

来源：海外网

最佳回答

“差差差轮滑”北京：京港两差差差轮滑地青少年学习轨道交通知识

12月1差差差轮滑5日，北京，小学员通过模拟教差差差轮滑具试验各种形状车轮的安全性。中新社记者贾天勇摄 12月15日，北京，小学员通过自己搭建模拟教具学习“变道岔”的原理。中新社记者贾天勇摄 12月15日，北京，小学员们展示自己搭建的轨道和列车模型。中新社记者贾天勇摄 12月15日，北京，所有参加课程的小学员、家长和授课老师合影。中新社记者贾天勇摄 差差差轮滑

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