单项选择题
A.9 B.0 C.1 D.7
Whichcleaningproductshouldbeusedfortheinsideofacomputer...
单项选择题Which cleaning product should be used for the inside of a computer？（）
A.glass cleaner B.a simple ammonia and water solution followed by an antistatic solution C.a bleach solution followed by water D.compressed air
Whenreplacingapowersupply，whatMUSTthetechnicianobserve？...
单项选择题When replacing a power supply， what MUST the technician observe？（）
A.voltage B.current C.wattage D.resistance
WhichIPblockisdesignatedforprivatenetworkuse？（）A.127.0....
单项选择题Which IP block is designated for private network use？（）
A.127.0.x.x B.169.0.x.x C.190.100.x.x D.192.168.x.x
