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 A．validity有效性，合法性。B．liability责任，负债。C．capacity容量，地位。D．intensity强烈，强度。
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