Answer: B, C, D, E

The legal significance of trademark use includes: 1. It is an important condition for maintaining and protecting the exclusive right of a registered trademark; 2. It is to determine whether it constitutes trademark infringement. Important elements of behavior; ③ It is a necessary condition for unregistered trademarks to obtain passive protection; ④ For different applicants applying for the same or similar trademarks on the same product or similar products on the same day, the State Intellectual Property Office will preliminarily determine And announce the previously used trademark; ⑤ is the actual use status of the trademark, which is an important condition for obtaining well-known trademark protection.