单项选择题

{{HTML}} ?(75) ?Development is a structured design methodology that proceeds in a sequence from one phase to the next.

A．Waterfall
B．Phased
C．Prototyping
D．Parallel

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单项选择题

{{*HTML*}}Stack is quite simple. Many computer systems have stacks built into their circuitry. They also have machine-level instructions to operate the hardware stack. Stack is ?(73) ?in computer systems.

A．useless
B．not important
C．simple but important
D．too simple to be useful

单项选择题

{{*HTML*}}The basic unit of measure in a computer system is the ?(72) ?. It is the smallest unit in computing. There are some other measures in a computer, such as Kilobyte, Megabyte, Gigabyte and so on.

A．Kilobyte
B．Bit
C．Gigabyte
D．Megabyte

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