资源节约型
You have a USB drive. You connect the drive to a computer that runs Windows XP Professional Service Pack 2 (SP2). You discover that after 15 minutes, the USB drive fails to appear in My Computer. You need to ensure that the USB drive appears in My Computer. What should you do?（） ["At the command prompt, run defrag.exe -f.","At the command prompt, run chkdsk.exe \/f. ","From Disk Management, assign a drive letter to the USB drive. ","Delete the usbui.dll file from the computer, and then restart the computer."]
该进口设备的国外运输保险费为（）万元。 ["12","4.41","4.68","4.396"]
为什么SDS-凝胶电泳会不受蛋白质分子所带电荷及分子形状的影响？
The Testking Corporation consists of the head office in New York with its regional offices in: Chicago, Detroit, Philadelphia, Toronto, and Atlanta. These offices need to be connected in a WAN, and Testking wishes to do this via a hub and spoke arrangement that will utilize packet-switched technology.Which one of the WAN technologies below would be the best choice for Testking?（） [" ISDN"," Wireless"," Frame Relay"," T1 leased line"," ATM"," VPN"]
稳态
