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    【题目】some scientists believe that the development of full artificial intelligence could _____ the end of the human race.

    A. spell B. increase C. promote D. threaten

    【答案】A

    【解析】考查动词。A. spell意味着；B. increase 增加；C. promote 促进，提升；D. threaten威胁。句意：一些科学家认为，完全人工智能的发展可能意味着人类的终结。此处表示意味着，故选A.

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