中国大学MOOC:"In London, the tube charges by length of journey and by region. ";
举一反三
- South Region is the second most populous region of the country, next to Northeast Region.( )
- In every administrative region of Italy, there is a wine region.
- American cuisine varies greatly from region to region.
- 中国大学MOOC: 翻译：test tube baby
- The build-in electric field is from p region to n region.<br/>( )