单项选择题
When installing an inkjet printer for the first time， which of the following should be done FIRST？ （）
A.Print a test page from the Printer icon under the printers tab.
B.Select the new printer as the default printer.
C.Run the printhead alignment within the Tools folder of the printer.
D.Ensure that the printer is set for bi-directional printing.
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Whenacomputerdoesnotrecognizeaninternalmodem，atechnicianshoulddeterminewhether：（）
A.the modem is seated properly.
B.the number being dialed is valid.
C.there are resource conflicts.
D.there is power to the modem.
E.the modem speaker is enabled. -
单项选择题
Whichofthefollowingwillhelpprotectanoperatingsystemfromvulnerability？（）
A.Download free anti-virus programs from the Internet.
B.Perform updates from the manufacturers website regularly.
C.Using the operating systems email program only to open attachments.
D.Monitoring what is displayed on the screen. -
单项选择题
WhichofthefollowingRAIDconfigurationstakesadvantageofmirroring？（）
A.RAID 1
B.RAID 5
C.RAID 0
D.RAID 2
