单项选择题

The cultural communication problems are becoming especially urgent for ______.

A．American managers
B．multinational companies
C．Japanese employees
D．consulting firms
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单项选择题
According to the passage, DNA fingerprinting can be unreliable when ______.
A．the methods Used of blood cell calculation are not accurate
B．two different individuals of the same ethnic group may have the same DNA fingerprinting pattern
C．a match is by chance left with fingerprints that happen to belong to two different individuals
D．two different individuals leave two DNA samples
单项选择题
The 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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