【单选题】WLANs are increasingly popular because they enable cost-effective connections among people, applications and data that were not possible, or not cost-effective, in the past. For example, WLAN-based ap...
【简答题】Unreality Of TV Dr. Heinrich Applebaum recently completed a study on the effects of television on children. In his case, though, he wasn’t concerned with violence, but how television gives children a ...