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

选项 A、validity
B、liability
C、capability
D、intensity

答案C

解析 本题考查词义辨析。A选项意为“效力;正确性”,B选项意为“责任;债务”,某些考生可能会误以为这个词和ability有关系。C选项意为“性能;容量;才能”,D选项意为“强度;烈度”。通观全句,extend和man’s senses提示替换词应该是某种感受的“机能,能力”,能够“得到提升”,排除语义不相干的A、B、D选项比较容易。题干替换词为熟词,意为“能力”。
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