A． programmed computer begins to show on its screen the figures you need

A．to be switched on

B．when switched on

C．switching on

D．being switche don

[试题]Robots are programmed and______(engineer)to perform. industrial tasks without human intervention.

[名词解释] 编程性细胞死亡（programmed cell death）

[单选题]Fuel oil begins injection into the cylinder of a four-stroke/cycle diesel engine during the （）.A . intake strokeB . exhaust strokeC . power strokeD . compression stroke

[名词解释] programmed cell death,PCD(程序性细胞死亡)

[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

[单选题]A top-down security analysis begins by:A.Analyzing a firm's business prospe

[单选题]The two-stroke cycle begins with the piston coming up from the bottom of its stroke, with scavenge ports in the sides of the cylinder being （）.A . shutB . closingC . openedD . closed

[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

[单选题]A．(66)computer is a personal computer whose hardware is capable of using any or all 0f the following media in a program：audio，text，graphics，video and animation．A．databaseB．multimediaC．networkD．mainframes

[单选题]The river [widens]considerably as it begins to turn west.A.twistsB.stretche