单项选择题

A．The name of a German town.
B．A resident of Frankfurt.
C．A kind of German sausage.
D．A kind of German bread.
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单项选择题
Which of the following is true about the expressed sequence tags
A．They’’ are difficult to mark’’ off.
B．They contain unidentified genetic information.
C．They contain the entire human genetic information.
D．They are genes whose specific functions have been identified.
单项选择题
A．A famous family.B．A rich family.C．A poor family.D．A common family.
A．A famous family.
B．A rich family.
C．A poor family.
D．A common family.
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