单项选择题
A. They need to do some filtering very fast. B. As a member of an organization, they should decide for themselves. C. They should try to make their treasure inaccessible.
A. It protected packets of information from being raided. B. It can break everything up into little packets. C. It can meet the world demand of the generic plug-in card.
A. All the devices and parts are put in the basement. B. All the devices and parts are put into a single box. C. Cellular phone and Internet are part of this system.