12.USB flash drives use volatile storage technology, which provides fast access to data, and uses very little power. ( )

A. 正确

B. 错误

14.Programs that add functionality to other programs, such as browsers, are referred to as ____. ( )

A. 　add-ins

B. 　plug-ins

C. 　peripherals

D. 　applications

4.Most computers include a CD drive or DVD drive that uses a magnet to read data stored on plastic-coated CDs and DVDs.} ( )

A. 正确

B. 错误

30.In the context of computing, software refers to symbols that represent facts, objects, and ideas. ( )

A. 正确

B. 错误

53.A ____ screen can detect the location of a fingertip or stylus within the screen area. ( )

A. 　touch-based

B. 　touch-sensitive

C. 　sound-sensitive

D. 　sound-based

44.A( ) ____ produces an image by manipulating light within a layer of liquid crystal cells. ( )

A. 　LED

B. 　plasma screen

C. 　LCD

D. 　CRT

85.Voice over IP ( ) carries voice conversations over a ____. ( )

A. 　cable network

B. 　computer network

C. 　cell tower network

D. 　telephone network

63.A ____ computer is a portable computing device featuring a touch-sensitive screen that can be used as a writing or drawing pad. ( )

A. 　notebook

B. 　laptop

C. 　PC

D. 　tablet

89.A computer can have a permanently assigned ____ IP address. ( )

A. 　connected

B. 　Static

C. 　default

D. 　dynamic

90.____ software helps a business keep track of the money flowing into and out of various accounts. ( )

A. 　Accounting

B. 　Project management

C. 　Groupware

D. 　Presentation