单项选择题

The most reliable and convenient identification method in present use is ______.

A．signatures
B．photographs
C．fingerprints
D．magnetic stripes
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单项选择题
If the technical problems can be worked out, which method is the most promising
A．Voiceprints.
B．Fingerprints.
C．Photographs.
D．Signatures.
单项选择题
According to the passage, cirrhosis (Para. l) is ______.
A．a bad habit resulting from drinking too much
B．a severe brain disease
C．the inevitable result of heavy drink
D．a fatal liver disease
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