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当上桌后发现是客人没点的菜怎么办？

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You install Windows 2000 Professional on your portable computer. You install an SCSI and PC card adapter, that you can use in the office to use color scanner. You use a docking station for your computer when you are in the office. You want to maximize the battery performance for your portable computer. You also want to prevent the driver from loading whenever you are away from the office. What should you do?（）

A. When away from the office use Device Manager to remove the adapter.
B. When away from the office configure the startup properties for the adapter to be automatic.
C. Remove the computer from the docking station and start Windows 2000 Professional to disable the SCSI PC card adapter device for the current profile.
D. Remove the computer from the docking station and start Windows 2000 Professional, use Device Manager to remove SCSI PC card adapter device.

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桥是指身体面向地面，手和脚支撑成弓形的一种姿势。

A. 正确
B. 错误

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在空气精馏中，回流比一般是指塔内（）与（）之比。

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为什么母线的夹板螺丝有时一个是铜的，一个是铁的？

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