单项选择题
A. ping -l 9999
B. tracert -d
C. ping -t
D. tracert -h 9999
单项选择题 In which of the following locations could a technician restart the printer spooler?（）
单项选择题 Which of the following should be performed after a maintenance kit has been applied and fullfunctionality tested?（）
单项选择题 Within a 64-bit Windows desktop OS, by default where are the program files for 32-bit programs located?（）