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【单选题】Los Alamos National Laboratory scientists are using a new technique to see fingerprints on surfaces that typically make them invisible. The method uses a technology called mini-X-ray fluorescence (荧光)...
A.
They can’t detect the chemical elements in fmgerprints.
B.
They use treatment that may change the fingerprint pattern.
C.
They bring out the fingerprint pattern with regular light.
D.
They can’t create computer picture of fingerprints.
【单选题】Los Alamos National Laboratory scientists are using a new technique to see fingerprints on surfaces that typically make them invisible. The method uses a technology called mini-X-ray fluorescence (荧光)...
A.
the powder used in the conventional methods
B.
images that can only be seen in computer
C.
a scanner that is connected to a computer
D.
the memory of any digital recorders