The chairman of the company said that new techniques had ______ improved their p

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问题 The chairman of the company said that new techniques had ______ improved their production efficiency.[1999]

选项 A、violently
B、severely
C、extremely
D、radically

答案 D

解析副词词义辨析题。被修饰的动词improved表明要填入表积极意义的副词。radically“根本地，完全地”，符合题意，故答案为D。其他选项都含贬义：violently“狂暴地，猛烈地”，severely“严重地”，extremely“极端地”。

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