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  • 1. (2021·莲湖模拟) 阅读下面短文,从所给的四个选项中选出能回答所提问题或完成所给句子的一个最佳答案。

        Your Internet experience is ruined when the net speed is too slow—it takes so long to open a web page and the show you're watching stops every few minutes. That can be very boring. But it could be a thing of the past. China's major telecom carriers(电信运营商)will start to provide 5G services in China.

    The "G" in 5G refers to the generations of mobile technologies. 1G let us talk to each other, 2G let us send messages, 3G gave us mobile data(数据)and the Internet, and 4G made all of these things faster.

    Now 5G promises much faster speed, and more stable(稳定的)connections. This means that you will be able to download(下载)an entire HD movie in seconds and only experience a short delay(延迟)between sending and receiving data.

    According to the Straits Times, 5G will be able to improve many advanced technologies. With a 5G network, the short delay in information exchange will allow driverless cars to run more safely, as they will be able to communicate in real time and avoid probable dangers. Meanwhile, 5G-enabled wearable products will keep doctors in touch with their patients and warn them immediately if there's something wrong. Besides, VR games will become more popular with 5G. The short delay of 5G will make games feel even more real.

    But 5G is not perfect. For one thing, 5G will not "travel" far. On 4G networks, you can be 10 kilometers away from the nearest transmission base(传输基地). But 5G will only cover about 300 meters, meaning that we will need more transmission bases so that we can get signals. And in order to use 5G, we have to buy new products specifically designed for 5G that are expensive now.

    1. (1) The underlined word "ruined" here means "_______".
      A . achieved B . expected C . broken D . improved
    2. (2) What can't we do with 5G?
      A . Play games quickly and safely. B . Experience more stable network connections. C . Make VR games more popular. D . Download an HD movie in seconds.
    3. (3) What can we conclude(推断)from the passage?
      A . Fewer transmission bases will be needed in the near future. B . New products designed for 5G are cheap now. C . Many advanced technologies will be improved because of 5G. D . There will be no delay in information exchange with 5G.
    4. (4) How far can you be away from the nearest transmission base if you use a 5G mobile phone?
      A . About 3 kilometers B . About 10 kilometers. C . About 300 kilometers. D . About 300 meters.

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