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  • 更新 2022-09-03
  • 科目 英语
  • 题型 单选题
  • 难度 中等
  • 浏览 382

Los Angeles Times reported that researchers may have found a way to _________ human life by changing certain genes, so that humans might expect to live twice as long.

A.extend B.preserve
C.multiply D.transform
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LosAngelesTimesreportedthatres