Which of the following is a WiFi device？ （）

单项选择题InatypicalPDA，whichofthefollowingistheprimaryinputtool？（）

A.voice navigation
B.stylus
C.scroll wheel
D.keyboard

单项选择题Whichofthefollowingmodesconservesthemostbatterypowerwhileallowingretrievalofthecomputingsessionatalatertime？（）

A.Hibernate
B.Suspend
C.Standby
D.Shutdown

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.