单项选择题

The computations of the computer are measured in ______.

A．seconds
B．microseconds
C．milliseconds
D．nanoseconds
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单项选择题
A stored-program computer has ______.
A．an adding machine
B．a brain
C．a finger
D．a memory
单项选择题
The part of a computer that ______ is the size of the end of a finger.
A．prints the information
B．stores the information
C．does the computing
D．memorizes computing
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