You have a computer with a USB keyboard that is running Windows 2000 Professional. You install a USB scanner on this system. The system asks for the driver and you install them. After you restart your computer， you notice that the keyboard doesn’t work anymore. What should you do in order to make both， the keyboard and the scanner work？ （） ["Update the scanner drivers using certified drivers","Enable the USB port in the computers BIOS","USB keyboards DO NOT exist","Enable the USB hub controller","Reinstall the USB device driver and disable the USB error detectio"]
阐述企业信息化的内涵和意义。
阳极斑点
环境承载力具有（）、（）、（）、（）。
《中国共产党纪律处分条例》规定，违反民主集中制原则，拒不执行或者擅自改变党组织作出的重大决定，或者违反议事规则，（），给予警告或者严重警告处分；情节严重的，给予撤销党内职务或者留党察看处分。
阴极斑点
