单项选择题

The　Programming　Counter(PC)is　normally　used　to　point　out(67).

A．Programmed execution instruction
B．5The address of last execution instruction
C．The address of current execution instruction
D．The address of next execution instruction

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单项选择题

One use of networks is to let several computers share______such as file systems, printers, and tape drives.

A．CPU
B．memory
C．resources
D．data

单项选择题

Certain keywords or phrases in a hypertext document are linked to other online documents through(75).

A．hyperlinks
B．references
C．transports
D．containments

The Programming Counter(PC)is normally used to point out(67).

The　Programming　Counter(PC)is　normally　used　to　point　out(67).