Ungated _____ should only be permitted where the sight distance from the roadway exceeds 100 meters.
A: fencing
B: ailroad crossings
A: fencing
B: ailroad crossings
举一反三
- 中国大学MOOC: 8. Greening packaging should start from prevention, that is, packaging should be used only where needed.
- Elephant Eye Cave has an average height of roughly 3 meters, varies in width from 5 to 10 meters.( )
- To be safe, you should stay at least ______ meters away from the gorilla.
- sight distance
- passing sight distance