单项选择题

What are the scientist doing last in order to piece together the instruction book for human biology

A．They draw the genetic maps
B．They grow pure human DNA
C．They let a computer read its chemical sequence.

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单项选择题23（）

A．flourish
B．capitalize
C．prosper
D．boost

单项选择题The passage most probably is（）

A．an official document
B．a news story
C．an advertisement
D．a comment

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