单项选择题

Computer （） is a complex consisting of two or more connected computing units， it is used for the purpose of data communication and resource sharing.

A．storage
B．device
C．network
D．processor

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单项选择题
Integration （） is the process of verifying that the components of a system work togedler as described in the program design and system design speci6cations.

A．trying
B．checklng
C．testing
D．coding
单项选择题
The maximum number of dara that can be expressed by 8 bis is （）.

A．64
B．128
C．255
D．256
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