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
In the passage, which of the following is NOT included in the advantages of advertising（）

A．Securing greater fame
B．Providing more jobs
C．Enhancing living standards
D．Reducing newspaper cost.
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