Electron Recycling has developed a profitable business by recycling metals retrieved from ______electronic components.

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问题 Electron Recycling has developed a profitable business by recycling metals retrieved from ______electronic components.

选项 A、discarded
B、extended
C、unoccupied
D、suppressed

答案A

解析 recycling指的是对废弃物品的重新利用，句意应为“再利用从废弃电子元件中提取的金属”。答案是(A)discarded(丢弃，抛弃)。

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