64.In addition to a display device, such as a monitor, a computer display system also requires graphics that generates the signals for displaying an image on the screen. ( )

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11.Contrast ratio is the difference between the luminance of white and black pixels. ( )

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22.Input can be supplied by a person, by the environment, or by another computer. ( )

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123.In addition to the basic typing keys, desktop and notebook computer keyboards include a( ) keypad to efficiently move the screen-based insertion point.( )

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58.In the figure below, what does the 512 MB refer to in regards to the graphics card? ( )

A、　Graphics card speed

B、　Graphics card pixel concentration

C、　Graphics card video memory

D、　Graphics card resolution output

答案：C

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20.A computer network can encompass as few as one or as many as thousands of computers. ( )

A. 正确

B. 错误

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19.Microsoft is one of the most well-known databases for personal computers. ( )

A. 　Word

B. 　Access

C. 　Visio

D. 　Onenote

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25.The control unit directs microprocessor tasks. ( )

A. 正确

B. 错误

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60.Response time is measured in , with lower numbers indicating better response times. ( )

A. 　milliminutes

B. 　minutes

C. 　seconds

D. 　milliseconds

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152.A network server provides services to computers called _.

A. 　 modes

B. 　 terminals

C. 　 clients

D. 　 customers

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18.Most database software includes tools to create all of these EXCEPT . ( )

A. 　electronic forms

B. 　insight lists

C. 　queries

D. 　reports

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64.In addition to a display device, such as a monitor, a computer display system also requires graphics that generates the signals for displaying an image on the screen. ( )

A. 　ports

B. 　algorithms

C. 　switchboards

D. 　circuitry

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11.Contrast ratio is the difference between the luminance of white and black pixels. ( )

A. 正确

B. 错误

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22.Input can be supplied by a person, by the environment, or by another computer. ( )

A. 正确

B. 错误

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123.In addition to the basic typing keys, desktop and notebook computer keyboards include a( ) keypad to efficiently move the screen-based insertion point.( )

A. 　editing

B. 　number

C. 　locked

D. 　docked

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