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
单项选择题 Whenreplacingapowersupply，whatMUSTthetechnicianobserve？（）
单项选择题 WhichIPblockisdesignatedforprivatenetworkuse？（）
单项选择题 WhichprocessorusesaSlot1configuration？（）
