题目

阅读理解By the age of seven months, most children have learned that objectsstill exist even when they are out of sight. But it is something thatself-driving cars do not have. And that is a problem. For a self-driving car, abicycle that is momentarily hidden by a passing truck is a bicycle that hasdisappeared. How to give AI the reasoning ability for a seven-month-old childis now a matter of active research. Modern Al is based on the idea of machine learning. If an engineerwants a computer to recognize a stop sign, he does not try to write thousandsof lines of code that describe every patte如图所示，运输汽油等易燃易爆物品的车辆总有一条铁链拖在地上，这样做的目的是（ ）A．发出声音，引起路人注意B．把静电引入大地，避免因放电引起爆炸C．减缓车速，保证行车安全D．与地面发生摩擦，在运输车上积累电荷