The chairman of the company said that new techniques had_____improved their prod

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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 D项“根本上、本质地”与A“猛烈地，激烈地，极端地”、B“严格地，激烈地”和C“极端地、非常地”相比，更符合句意。

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