Users in an office routinely work with large graphics files. Which of the following preventivemaintenance tools can assist in maintaining system performance?（）

单项选择题A user reports that their touchpad no longer works on their laptop. Which of the following is the FIRST troubleshooting step?（）

A. Plug in USB keyboard
B. Check for a disable switch
C. Contact the laptop manufacturer
D. Plug in a USB mouse

单项选择题A user reports that their hard drive has failed and needs to be replaced. Which of the following should the technician do FIRST?（）

A. Run the hard disk manufacturer’s diagnostic program
B. Re-image the drive
C. Replace the hard drive and load Windows
D. Ask the user diagnostic questions

单项选择题A memory type typically used in high end workstations and not generally found in consumer gradePCs is:（）

A.ddR3.
B.ecc.
C.pc2-6400.
D.ddR2-667.

多项选择题Modern desktop computer systems require the following to properly dissipate heat（）

A. Temperature Control Panel
B. Thermal Compound
C. Liquid Cooling Systems
D. Processor Heat Sink
E. Case Fan

单项选择题While accessing the Internet in an external environment (i.e. while traveling), a Windows 7 firewall hould be set to which of the following?（）

A. Block incoming and outgoing connections
B. Turned off or disabled
C. Block outgoing connections
D. Block incoming connections