题目

What if the car waiting patiently behind a parked bus is a driverless or autonomous vehicle(AV)? Will this robot car be able to understand what you mean when you flash your lights or madly wave your hands? Its sensors could decides that it’s only safe to overtake when there’ no oncoming traffic at all. On a busy road at school home time, this may be never leading to increasingly angry passengers and increasingly angry driers queuing behind.And how will a robot car driving out from a T-junction into oncoming traffic be able to make the necessary eye contact with a human driver? These safety的绝对值是 A.-B.C.3D.-3