2. 外语
  3. To what extent will future scientific discoveries make possible the______of the human life span?

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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