2. 专升本
  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.
One of the biggest challenges is to build soft robots’ ________.
选项 A、silicone body
B、complex components
C、precise movements
D、flexible power source
答案D
解析 根据倒数第二段最后一句“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. ”可知，即使工程师能用硅酮制造出软体机器人的身体，但制作基本部件的柔韧版本，如电源，仍是一个巨大的挑战。故选D。
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