Modern desktop computer systems require the following to properly dissipate heat（）

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

单项选择题From which of the following locations can a technician map a drive?（）

A. System Properties
B. Help and Support Center
C. Add Hardware Wizard
D. My Computer