中国大学MOOC: Speed limits could rise with more people using self-driving cars. When self-driving cars prove they can 6) ______ at higher speed limits, speed limits could be raised.
举一反三
- 中国大学MOOC: Fewer accidents mean _______ traffic conditions, and reducing 5)_______, repairs and injuries. Speed limits could rise with more people using self-driving cars.
- 中国大学MOOC: Speed limits are generally higher on freeways and are occasionally nonexistent.
- During which period could British motorists drive without speed limits
- 中国大学MOOC: Self-driving cars could drive people who are unable to drive themselves. They could travel without 7) _________ others.
- 中国大学MOOC: Self-driving vehicles have brought and might bring to people both benefits and potential problems, limits and obstacles.