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.

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

答案 D

解析 radically从根本上，强调“彻底性”。violently猛烈地，极端地。severely严格地，严重地。extremely极其，极端，非常。

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