单项选择题
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A.Diseases can be diagnosed earlier.
B.Medicines will be targeted more accurately.
C.Scientists can identify and replace the faulty genes.
D.All of the abov
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单项选择题
A.Christopher Columbus.B.Amerigo Vespucci.C.Martin Waldseemueler.D.Unknown.
A.Christopher Columbus.
B.Amerigo Vespucci.
C.Martin Waldseemueler.
D.Unknown.
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