D.improved the selfdriving car systems
答案:B 细节理解题。由第二段第一句话“In September, California Governor Jerry Brown signed an act to allow autonomous vehicles on the roads of his state.”可知,Governor Jerry Brown支持自动汽车。
3. What is the role of the systems mentioned in Paragraph 3?
A.They can help people drive more safely.
B.They can take the place of drivers now.
C.They can make cars run without fuel.
D.They can help cars run much faster.
答案:A 细节理解题。由第三段内容可知,自动汽车系统更节油、更安全,能帮助驾驶员但是不能代替驾驶员。
4. According to Richard Mason, what is the biggest challenge for driverless cars?
A.They are not allowed to run on the road.
B.Their technical problems remain to be solved.
C.They are now too expensive for consumers.
D.They are more dangerous for people on the street.
答案:C 细节理解题。由最后一段第一句话“Mason said ... the biggest challenge now is getting down the cost for driverless vehicles from hundreds of thousands of dollars to something more affordable.”可知,价格是其最大的挑战。
5.What's the best title of the passage?
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