In general, positional goods cannot be created,only redistributed, while material goods can be created with time and effort.（ ）
举一反三
- 2.Why can a great variety of goods and services be created in the process of importing and exporting?
- Since time cannot be created, we need tomake choices and make a plan.
- The idea that electricity cannot be created or destroyed may seem to imply that electrons and protons cannot be created or destroyed.
- Only some Chinese goods can be found in Chinatown.
- Which two are true regarding external tables？ （） A: AExternal tables can be updated. B: BExternal tables are read-only tables. C: CIndexes can be created on external tables. D: DIndexes cannot be created on external tables.