2. 外语
  3. The dancers stand motionless at their position and the room grows silent. But as the music starts, they began to move, bending,

The dancers stand motionless at their position and the room grows silent. But as the music starts, they began to move, bending,

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问题     The dancers stand motionless at their position and the room grows silent. But as the music starts, they began to move, bending, turning and waving their fans gracefully as they perform a traditional Japanese dance. Yoshihiro Kuroki watches in silence, occasionally making notes. But as the dance ends, he beams with happiness. The performance has been flawless.
    There have been many performances of traditional Japanese dances over the centuries, but this one is unique, because it is performed not by human dancers but by robots. And the performance takes place not in a dance studio but in a laboratory of Sony Corp.’s Entertainment Robot Co. in Shinagawa, Japan, where Kuroki is general manager. He is the mastermind behind a series of even more capable humanoid entertainment robots, starting with the Sony Dream Robot, or SDR, in 1997, up to the current QRIO in 2003.
    These delightful machines are only 58 cm tall, about the size of a newborn infant, weigh about 7 kg, and move with 38 degrees of freedom, each with its own servomotor(辅助马达).
    QRIO’s predecessor, the SDR4X, announced in 2002, can walk, dance, sing, speak, recognize faces, and understand continuous speech. Each robot has two charge-coupled-device cameras to detect color and position and can locate a colored ball, move toward it, and kick it into a goal. It also has contact sensors in several joints to avoid pinching real human fingers. Seeing the robot perform, it is difficult to remember that there is no sentience(知觉)behind those glass eyes.
Which aspect of the robots is NOT mentioned in the passage?
选项 A、The vividness of their motion.
B、Their pleasant appearance.
C、Their smart designing principles.
D、Their communicative ability.
答案D
解析 全文分四段，分别讨论机器人三方面的特点：第1段和第2段描述机器人舞蹈演员栩栩如生的表演，即选项A；第3段描写它们的外表，即选项B；第4段介绍它们巧妙的设计，即选项C；只有选项D是没有提到的，故为答案。
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