单项选择题

The passage is mainly about ______.

A．the discovery of fingerprinting by Jeffery
B．the practice of fingerprinting in court
C．the fingerprinting in the present situation
D．the merits and demerits of fingerprinting

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热门试题

单项选择题

By saying DNA testing is not an unfailing proof of identity , the author means

A．DNA testing can be wrong in its practices
B．there are identical patterns of genetic material
C．many people have the identical DNA profiles
D．DNA testing are endangering people's privacy

单项选择题

The British DNA database is established to ______.

A．find the identical DNA profiles
B．help criminal investigations
C．store people's personal information
D．treat people of potential diseases