Radar is used to extend the ______ of man’s senses for observing his environment

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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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