在多任务处理的上下文切换方式中，所有后台任务都不能使用CPU，它们处于 ( )

推送待办任务

进入授权菜单处理

以上两种模式都支持

Think you can walk, drive, take phone, calls, e-mail and listen to music at the same time Well, New York’s new law says you can’t (46) The law went into force last month, following research and a shocking number of accidents that involved people using electronic gadgets(小巧机械)when crossing the street.

Who’s to blame (47) "We are under the impression that our brain can do more than it often can," says Rene Marois, a neuroscientist(神经科学家)in Tennessee. "But a core limitation is the inability to concentrate on two things at once."

The young people are often considered the great multitaskers. (48) A group of 18- to 21-year-olds and a group of 35-to 39-year-olds were given 90 seconds to translate images into numbers, using a simple code. (49) But when both groups were interrupted by a Phone call or an instant message, the older group matched the younger group in speed and accuracy.

It is difficult to measure the productivity lost by multitaskers. But it is probably a lot. Jonathan Spira, chief analyst at Basex, a business-research firm, estimates the cost of interruptions to the American economy at nearly ＄ 650 billion a year. (50) The surveys conclude that 28 percent of the workers’ time was spent on interruptions and recovery time before they returned to their main tasks.

Think you can walk, drive, take phone calls, e-mail and listen to music at the same time Well, New York’s new law says you can’t._______(46) The law went into force last month, following research and a shocking number of accidents that involved people using electronic gadgets (小巧机械) when crossing the street. 　　

Who’s to blame _______ (47) "We are under the impression that our brain can do more than it often can," says Rene Marois, a neuroscientist (神经科学家) in Tennessee. "But a core limitation is the inability to concentrate on two things at once." 　　

The young people are often considered the great multi-taskers. _______ (48) A group of 18- to 21-year-olds and a group of 35- to 39-year-olds were given 90 seconds to translate images into numbers, using a sample code. _______ (49) But when both groups were interrupted by a phone call or an instant message, the older group matched the younger group in speed and accuracy. 　　

It is difficult to measure the productivity lost by multi-taskers. But it is probably a lot Jonathan Spira, chief analyst at Basex, a business-research firm, estimates the cost of interruptions to the American economy at nearly $650 billion a year. _______ (50) The surveys conclude that 28 percent of the workers’ time was spent on interruptions and recovery time before they returned to their main tasks.

Windows98支持386处理器的三种工作模式

在Windows98的保护模式下，所有的应用程序都运行在保护级别最低的0环

在通常情况下，Windows98采用的是并发方式的多任务处理

在Windows98中，Windows虚拟机分为系统虚拟机和MSDOS虚拟机

精神奖励

物质奖励

及时奖励

定期奖励

用户如果只启动一个应用程序，则该程序就可以自始至终独占CPU资源

由于CPU中有多个执行部件，可同时执行多条指令，所以才能同时执行多个任务的处理

从微观上看，前台任务和后台任务能同时得到CPU响应

Windows操作系统在执行32位应用程序时，采用的是按时间片轮转的调度方法

从微观上看，前台任务和后台任务能同时得到CPU响应

由于CPU中有多个执行部件，可同时执行多条指令，所以才能同时执行多个任务

用户如果只启动一个应用程序，则该程序就可以自始至终独占CPU资源

Windows操作系统在执行32位应用程序时，采用的是按时间片轮流的调度方法

每个任务通常都对应着屏幕上的一个窗口

用户正在输入信息的窗口

前台任务只有1个，后台任务可以有多个

前台任务可以有多个，后台任务只有1个

正确

错误

Think you can walk, drive, take phone, calls, e-mail and listen to music at the same time Well, New York’s new law says you can’t (46) The law went into force last month, following research and a shocking number of accidents that involved people using electronic gadgets(小巧机械)when crossing the street.

Who’s to blame (47) "We are under the impression that our brain can do more than it often can," says Rene Marois, a neuroscientist(神经科学家)in Tennessee. "But a core limitation is the inability to concentrate on two things at once."

The young people are often considered the great multitaskers. (48) A group of 18- to 21-year-olds and a group of 35-to 39-year-olds were given 90 seconds to translate images into numbers, using a simple code. (49) But when both groups were interrupted by a Phone call or an instant message, the older group matched the younger group in speed and accuracy.

It is difficult to measure the productivity lost by multitaskers. But it is probably a lot. Jonathan Spira, chief analyst at Basex, a business-research firm, estimates the cost of interruptions to the American economy at nearly ＄ 650 billion a year. (50) The surveys conclude that 28 percent of the workers’ time was spent on interruptions and recovery time before they returned to their main tasks.