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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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 |