2. 外语
  3. Nothing has ever equaled the ______and speed with which the human species is altering the physical and chemical world.

Nothing has ever equaled the ______and speed with which the human species is altering the physical and chemical world.

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问题 Nothing has ever equaled the ______and speed with which the human species is altering the physical and chemical world.
选项 A、concern
B、magnitude
C、volume
D、carelessness
答案B
解析 本题属于词义辨析题。A项表示“关心，忧虑”，B项表示“(量，范围的)大小”，C项表示“体积，容量”，D项表示“粗心”。从句子的意思看，应该是“没有什么能比得上人类改变物理和化学世界的范围和速度”，所以只有B是正确答案。
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