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  • 1. (2020高二上·河北期末) 阅读理解

        Scientists are attempting to extract (提取) cells from a 40,000-year-old horse in hope of using the sample to clone the extinct (灭绝的) species back into existence. The male baby horse was discovered in 2018 in permafrost (永冻土) in northeastern Siberia of Russia.

        A team of scientists from South Korea and Russia believes the young horse, called the Lenskaya or Lena horse, was about 20 days old when it died. The species of horse, now extinct, is between 30,000 and 40,000 years old. Thanks to the terrible coldness, the animal's tissue was preserved enough for the scientists to obtain samples.

        Semyon Grigoriev, head of the lab at the Mammoth (猛犸象) Museum of the North-Eastern Federal University in Yakutsk, said the horse was "well - preserved" and a "great find". There is no damage to the horse's body and even its hair is undamaged. The unfortunate animal, according to Gngo-riev, "could have drowned after falling into some kind of a natural trap."

        Hwang Woo-suk, a researcher from South Korea working on the project, said, "If researchers find a cell, they will do their best to clone the animal. If we get live cells from this ancient baby horse, it would be wonderful in terms of cloning."

        After that, they will make a cloned embryo (胚胎) and a female horse carry it as its mother. Hwang said modern-day horses are "very similar to the ancient one," so there would be no problem getting help from a modern-day female horse.

        The scientists are hoping the experiment on the baby horse will give them experience in progressing toward their ambitious goal-bringing back the extinct woolly mammoth.

        "If we manage to clone the horse-it will be the first step to cloning the mammoth." Hwang said.

    1. (1) Why was the Lenskaya horse kept in good condition?
      A . The temperatures were extremely low. B . It was buried under the ground. C . Alocal museum had preserved it. D . It died quite young.
    2. (2) What do we know about the baby horse?
      A . It was a female horse. B . It might have died by accident. C . Its hair was partly destroyed. D . Its tissue can hardly be found.
    3. (3) What must the researchers do before cloning the extinct horse?
      A . Know more about extinct ancient horses. B . Make an embryo i a female horse. C . Find an ideal modern - day female horse. D . Get live cells from the baby horse.
    4. (4) What can be the best title for the text?
      A . A new horse species found in Siberia B . How to preserve ancient animals' tissues C . Scientists attempt to clone extinct horse D . How to extract cells from extinct species

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