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  • 1. (2022·鞍山)  阅读短文, 从短文后的选项中选择合适的句子还原到短文中, 使短文意思通顺、结构完整。

    The Beijing 2022 Winter Olympic Games were more than a sporting event. They are helping athletes(运动员)become "faster, higher, stronger" and offering you a great game- watching experience with the support of 5G. Let's look at some technologies behind the Beijing 2022 Winter Olympic Games. The National Speed Skating Oval(国家速滑馆)is said to have"the fastest ice", as twelve new Olympic records and one world record were set there, including Chinese speed skater GaoTingyu's Olympic record of 34. 32 seconds in the men's 500 meters.

     If the ice surface temperature doesn't change much, the ice will stay even flatter(平滑的). Liquid carbon dioxide(液体二氧化碳) is put under the ice to keep the temperature changes on the ice surface within half a degree. 

    In events like freestyle skiing and ski jumping, the direction and speed of the wind can have a great influence on an athlete's performance. Some events only last a few seconds and the wind is changing all the time. A research team from the Chinese Academy of Sciences(中国科学院) developed a system to measure wind. It allows athletes and coaches to "see" wind directly with real-time data(数据)on their pads(便携式电脑)and decide when and where to jump.

    During the speed skating race, athletes can reach speeds of up to 18 meters per second. To catch every exciting moment of the competition, we have used Lie Bao for the event. Lie Bao is a 4K high-definition(高清) camera system developed by China Media(媒体的)Group.  It closely follows the athletes' movements and catches different scenes during speed skating, according to the report. 

                                     

    A. The system uses AI technology. 

    B. They were also a show for science and technology. 

    C. The secret is a new ice-making technology. 

    D. It can record speeds of up to 25 meters per second. 

    E. That keeps the ice a flat surface and it is easier to skate on. 

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