How long is the economic distance for motor? （）
举一反三
- How long is the distance covered by the Three Gorges?
- How long is Sydney to Melbourne Ultramarathon? The distance is 875 km.
- What's the distance from Pinhurst to Silbury? How ______ is Pinhurst ______ Silbury? A: long ago⋯until B: long⋯away C: away⋯till D: far⋯from
- The first long distance telephone was built in ( ).
- Twenty miles (be) ______ a long distance to walk.