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  3. Traditionally, robots have been hard, made of metal and other rigid materials. But a team of scientists at Harvard University in

Traditionally, robots have been hard, made of metal and other rigid materials. But a team of scientists at Harvard University in

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问题     Traditionally, robots have been hard, made of metal and other rigid materials. But a team of scientists at Harvard University in the US have managed to build an entirely soft robot—one that draws inspiration from an octopus (章鱼).
    Described in the science journal Nature, the " Octobot" could pave the way for more effective autonomous robots that could be used in searches, rescue and exploration. "The Octobot is the minimal system which may serve as a foundation for a new generation of completely soft, autonomous robots," the study’s authors wrote.
    Robots built for precise, repetitive movements in a controlled environment don’t do so well on rough terrains(地形) or in unpredictable conditions. And they aren’t especially safe around humans, because they’ re made out of hard and heavy parts that could be potentially dangerous for their users.
    So researchers have been working on building soft robots for decades. They’ve taken inspiration from nature, looking at animals from jellyfish to cockroaches, which are often made up of more flexible matter.
    But creating a completely soft robot remains a challenge. Even if engineers build a silicone (硅酮) body, it’s still a grand challenge to construct flexible versions of essential parts, such as a source of power.
    "Although soft robotics is still in its early stage, it holds great promise for several applications, such as search-and-rescue operations and exploration," Barbara Mazzolai and Virgilio Mattoli of the Italian Institute of Technology’s Center for Micro-Bio Robotics, wrote in a comment. "Soft robots might also open up new approaches to improving wellness and quality of life.
What can we infer from the application of the "Octobot"?
选项 A、It has been used in various fields.
B、It has not been put into use on a large scale.
C、It has been used in the field of rescue.
D、It has not been tested yet.
答案B
解析 根据最后一段第一句“‘Although soft robotics is still in its early stage, it holds great promise for several applications, such as search-and-rescue operations and exploration’…”可知，目前软体机器人还处于初级阶段。由此可推知，“章鱼机器人”还未被太规模地投入使用。故选B。
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