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 above.
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单项选择题
A.In his early twenties.B.In his late twenties.C.In his early thirties.D.In his late thirties.
A.In his early twenties.
B.In his late twenties.
C.In his early thirties.
D.In his late thirties.
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