单项选择题

______ wrote The Grapes of Wrath.

A．John Steinbeck
B．Eugene O'Neil
C．F. Scott Fitzgerald
D．Theodore Dreiser
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单项选择题
Which of the following expressions about the Visionics Corp's face scanning system is NOT true
A．It can't replace the law enforcement.
B．It has been improved.
C．It has been widely used in entertainment districts.
D．The database of the system contains photographs of a limited amount of peopl
单项选择题
The technology in the second paragraph refers to ______.
A．face-scanning systems
B．fingerprint systems
C．gummy dummies
D．biometrics
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