The word "radar" is formed by______.

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问题 The word "radar" is formed by______.

选项 A、abbreviation
B、conversion
C、derivation
D、blending

答案A

解析 考查构词法。abbreviation“缩写法”,conversion“转换法”,derivation“派生法”,blending“混合法”。radar(雷达)是由radio detecting and ranging缩写而成,故选A。
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