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“STD”包括哪些？

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某一分支器上标有418表示什么意思？

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？（）

A. Update the scanner drivers using certified drivers
B. Enable the USB port in the computers BIOS
C. USB keyboards DO NOT exist
D. Enable the USB hub controller
E. Reinstall the USB device driver and disable the USB error detectio

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洋务运动中创办的近代军事工业是（）

A. 轮船招商局
B. 汉阳铁厂
C. 湖北织布局
D. 江南制造总局

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硅铁“冒瘤”有什么危害？

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