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【題目】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】考查動詞。A. spell意味著；B. increase 增加；C. promote 促進，提升；D. threaten威脅。句意：一些科學家認為，完全人工智能的發(fā)展可能意味著人類的終結。此處表示意味著，故選A.

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