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【题目】The traffic lights are controlled by a (centre) computer.

【答案】central
【解析】句意: 交通灯被一个中心电脑控制。此处“中心电脑”中心应是形容词,修饰电脑,Central的意思是"中心的"。根据句意及所给单词提示, 所以答案是central。

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