单项选择题

We are told that a high-tech cash register is really just______.

A．an electric instrument of sight.
B．a simple adding machine.
C．a way to keep employees honest.
D．an expensive piece of window dressing.
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单项选择题
According to the passage, the maximum intensity of sound coming from commercials______.
A．does not exceed that of programs
B．is greater than that of programs
C．varies over a large range than that of programs
D．is less than that of programs
单项选择题
Grocery store price lists are updated by______.
A．a scanner
B．a telephone hookup
C．an adding machine
D．an employee
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