2. 外语
  3. Cubes aren’t usually the go-to shape when creating an object that’s meant to move around, but【C1】________in Switzerland have cre

Cubes aren’t usually the go-to shape when creating an object that’s meant to move around, but【C1】________in Switzerland have cre

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问题     Cubes aren’t usually the go-to shape when creating an object that’s meant to move around, but【C1】________in Switzerland have created one that can do just that—along with a【C2】________of other surprising talents. Called the Cubli, it measures nearly 6 inches on each side and can walk around by【C3】________flipping itself over. Perhaps more impressively, it can also balance on any of its sides or even just a single corner. As the research team from ETH Zurich’s Institute for Dynamic Systems and Control【C4】________in a video, the cube can even remain balanced while a surface is raised up at an angle beneath it.
    Though it’s a moving cube, the Cubli still【C5】________on a series of spinning wheels to get going. Three internal wheels angled along a different axis each will spin faster or slower in order to maintain enough momentum to keep the cube balanced. By quickly【C6】________a spinning wheel, the cube can also be caused to flip over,【C7】________allowing it to move around. The researchers say that Cubli’s system of spinning wheels is similar to what【C8】________satellites out in space, and that other research groups have considered using this technology to build robots that could be used to explore other planets.
    A group of researchers at MIT later demonstrated another use for【C9】________like this: allowing a robot to reassemble itself. MIT’s cubes had magnets embedded across their sides and edges, which let them grip each other and form different shapes. Though they weren’t able to balance like the Cubli can, MIT’s "M-blocks" could move much【C10】________— actually hopping off the ground when getting around.
    A)blocks        E)effectively  I) hardly      M)spheres
    B) continually  F) further     J) preceding   N) stabilizes
    C) delightful   G) halting     K) relies      O) stronger
    D) demonstrates H) handful     L) researchers
【C4】
选项
答案D
解析 动词辨义题。空格所在的分句缺少谓语动词，该分句的主语为the research team，而上下文采用的时态都为一般现在时，由此可以判断此处需要填入一个动词的第三人称单数形式，且意义要能与a video构成关联。备选词汇中只有demonstrates(演示)符合此处语境，故选D。
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