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 |
推荐套卷
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 |