单项选择题

A．Proteins.
B．All of the above.
C．A sequence of DNA
D．Cells.
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单项选择题
A．The man’s children saw many old movies.B．The man saw more old movies than the woman.C．The woman saw a good many old movies when she was young:D．The woman doesn’ t like old movies.
A．The man’s children saw many old movies.
B．The man saw more old movies than the woman.
C．The woman saw a good many old movies when she was young:
D．The woman doesn’ t like old movies.
单项选择题
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
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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