单项选择题

A．The Philippines.
B．Mexico.
C．Brazil.
D．Guatemala.
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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
A．The timely advice from her friends and relatives.B．The two-year professional training she received.C．Her determination to fulfill her dream.D．Her parents’’ consistent maral support.
A．The timely advice from her friends and relatives.
B．The two-year professional training she received.
C．Her determination to fulfill her dream.
D．Her parents’’ consistent maral support.
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