The primary method used on eBay is（ ）.
举一反三
- eBay is a website devoted to providing a place for people around the world to buy or sell items and the primary method used is auction.
- 3B teaching method can be used only in primary English teaching.
- 中国大学MOOC: Which research method can be used to collect primary data?
- Which research method can be used to collect primary data? A: Statistical analysis B: Observations C: Online search D: All of the three.
- Primary research method can include( ).