The chairman of the company said that new techniques had______ improved their production efficiency.

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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 副词辨析 radically 表示“根本地;本质地;彻底地;极端地”;extremely 表示“极(端);非常;极其”。 从此句所谈的内容看,D最合适。
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