Sam _____ some knowledge of the computer just by watching others working on it.

A． brought up

B． looked up

C． picked up

D． set up

Programming is not a simple thing; it ______ a lot of advanced knowledge of math

- Can I use the computer in the library to check some books? - _-CanIusethecompu

Some robots have TV cameras as eyes.Some have something to help them touch.Many

[名词解释] SAM现象（systolic anterior motion.SAM）

[名词解释] SAM

[单选题]A． ______ computer is a personal computer whose hardware is capable of using any or all of the following media in a program, text, graphics, video and animation.A．databaseB．multimediaC．networkD．mainframes

[名词解释] SAM现象

[单选题,配伍题] SAM征（）A .二尖瓣脱垂B .二尖瓣狭窄C .大量心包积液D . D.肥厚型心肌病E .扩张型心肌病

[名词解释] SAM征

[单选题]A computer virus is a computer program that is created to make and spread (72) of itself.(72) A．programsB．virusC．copiesD．files