超星 - 交通方式未来发展前景小测试 - 查题吧

单选题

Which transportation form can be more suitable for the firefighters or emergency team?

A. Hyperloop
B. Marin Jetpack
C. Self-driving cars
D. Urban transport pods

单选题

When will the self-driving cars be available commercially by prediction?

A. 2021
B. 2018
C. 2019
D. 2020

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