To what extent will future scientific discoveries make possible the______of the human life span?

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问题 To what extent will future scientific discoveries make possible the______of the human life span?

选项 A、increase
B、expansion
C、growth
D、prolongation

答案D

解析近似名词辨析。prolongation意为“延长，拉长”；increase意为“增加；增大”；expansion意为“扩大，扩充”；growth意为“增长，增加；生长”。

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专业英语四级

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