|
An intelligent car Driving needs sharp eyes, keen ears, quick brain, and coordination between hands and the brain. Many human drivers have all __1__ and can control a fast-moving car. But how does an intelligent car control itself? There is a virtual driver in the smart car. This virtual driver has eyes,brains，hands and feet，too. The mini-cameras __2__ each side of the car are his eyes, which observe the road and conditions ahead of it. They watch the __3__ to the cars left and right. There is also a highly __4__ driving system in the car. It is the built-in computer, which is the virtual drivers brain.His brain calculates the speeds of __5__ moving cars near it and analyzes their positions. Basing on this information, it chooses the right __6__ for the intelligent cars, and gives __7__ to the handsand feetsto act accordingly. In this way, the virtual driver controls his car. What is the virtual drivers best advantage? He reacts __8__. The mini-cameras are __9__ images continuously to the brain. It __10__ the processing of the images within 100 milliseconds. However, the worlds best drier __11__ needs one second to react. __12__, when he takes action, he needs one more second. The virtual driver is really wonderful. He can reduce the accident __13__ considerably on expressway. In this case. Can we let him have the wheel at any time and in any place? Experts __14__ that we cannot do that just yet. His ability to recognize things is still __15__. He can now only drive an intelligent car on expressways. | 
