【大发彩神APP规律app计划_大发彩神APP规律app计划官网】2018 China VEX Robotics Competition held in Shanghai

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Contestants attend the 2018 China VEX Robotics Competition, which is also the qualification trials of VEX Robotics World Championship 2018, at Shanghai Jiao Tong University in Shanghai, east China, Nov. 3, 2018. Nearly 2,000 students across the country participated in the trials. (Xinhua/Liu Ying)

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