Which of the following modes conserves the most battery power while allowing retrieval of the computing session at a later time？（）

单项选择题Ifanexternalmonitorisattachedtoalaptopanditdoesnotwork，whichofthefollowingactionsshouldatechniciantakeFIRST？（）

A.Re-install the operating system.
B.Open and close the cover.
C.Use the function key to activate the monitor.
D.Install new software for the keyboard.

单项选择题Afterbootingupanewcomputer，atechnicianobservesthattheUSBportsarenotworkingwithanyUSBdevices.WhichofthefollowingshouldbedoneFIRST？（）

A.Check the computer to verify that the jumper settings for USB are correct.
B.Connect the USB devices to a different computer to test the devices.
C.Buy new USB wires and test USB functionality.
D.Check the BIOS to verify that USB functionality is enabled.

单项选择题Aclientreportsthatthelaptopisnotperformingacompletechargeofthebattery.WhichofthefollowingactionsshouldbetakenFIRST？（）

A.Update the BIOS.
B.Run the battery calibrator.
C.Reinstall the ACPI drivers.
D.Replace the power adapter.

多项选择题WhichofthefollowingareprimarydifferencesbetweenalaptopandadesktopCPU？（）

A.heat production 
B.L2 Cache 
C.clock speed 
D.front side bus
E.power consumption

单项选择题Whichofthefollowingareconsideredplugandplaytechnologiesinalaptop？（）

A.SATA
B.RAID
C.USB
D.EIDE