单项选择题

National Academy of Sciences holds the stance that ________.

A．DNA testing should be systematized
B．only authorized laboratories can conduct DNA testing
C．the academy only is authorized to work out standards for testing
D．the academy has the right to accredit laboratories for DNA testing
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单项选择题
The attitude of the Federal Bureau of Investigation shows that ________.
A．enough data are yet to be collected from various ethnic groups to confirm the unlikelihood of two DNA samples coming from two individual members
B．enough data of DNA samples should be collected to confirm that only DNA samples from the same person can match
C．enough data are yet to be collected from various ethnic groups to determine the likelihood of two different DNA samples coming from the same person
D．additional samples from various ethnic groups should be collected to determine that two DNA samples are unlikely to come from the same person
单项选择题
Before DNA fingerprinting is used, suspects ________.
A．would have to leave their fingerprints for further investigations
B．would have to submit evidence for their innocence
C．could easily escape conviction of guilt
D．could be convicted of guilt as well
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