2. 外语
  3. Radar is used to extend the ______ of man’s senses for observing his environment, especially the sense of vision.

Radar is used to extend the ______ of man’s senses for observing his environment, especially the sense of vision.

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问题 Radar is used to extend the ______ of man’s senses for observing his environment, especially the sense of vision.
选项 A、validity
B、liability
C、capacity
D、intensity
答案D
解析 intensity(思想、感情、活动等的)强烈，剧烈，紧张；validity正当，正确性，确实；liability倾向，责任；capacity能力。
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