理工類B級(jí)：完形填空An Intelligent Car

　　Driving needs sharp eyes，keen ears，quick brain，and coordination(協(xié)調(diào))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(虛擬的)driver in the smart car.This virtual driver has"eyes，""brains，""hands"and"feet，"too.The minicameras(2)each side of the car are his"eyes，"which(3)the road conditions ahead of it.They watch the(4)to the cars left and right.There is also a highly automatic driving(5)in the car.It is the built-in computer，which is the virtual drivers"brain."His"brain"(6)the speeds of other moving cars near it and analyzes their positions.Basing on this information，it chooses the(7)path for the intelligent car，and gives instructions to the "hands"and"feet"to act accordingly.In this way，the virtual driver(8)his car.

　　What is the virtual drivers best advantage?He reacts(9).The minicameras are bringing(10)continuously to the "brain."It completes the processing of the images within 100 milliseconds.(11)，the worlds best driver needs at least one second to react.Besides，when he takes(12)，he needs one more second.

　　The virtual driver is really wonderful.He can reduce the accident(13)considerably on expressways(高速公路).In this(14)，can we let him have the wheel at any time and in any place?Experts(15)that we cannot do that just yet.His ability to recognize things is still limited.He can now only drive an intelligent car on expressways.

　　1.A.these B.them C.this D.that

　　2.A.in B.above C.to D.on

　　3.A.change B.observe C.improve D.meet

　　4.A.police B.traffic C.pets D.trees

　　5.A.button B.door C.system D.activity

　　6.A.calculates B.reaches C.gathers D.reduces

　　7.A.different B.narrow C.same D.right

　　8.A.stops B.finds C.controls D.selects

　　9.A.quickly B.cleverly C.virtually D.safely

　　10.A.ideas B.news C.memory D.images

　　11.A.so B.However C.Besides D.Therefore

　　12.A.action B.role C.decision D.notice

　　13.A.investigation B.prevention C.rate D.report

　　14.A.case B.method C.manner D.file

　　15.A.expose B.warn C.hope D.wish

　　答案：1.A 2.D 3.B 4.B 5.C6.A 7.D 8.C 9.A 10.D11.B 12.A 13.C 14.A 15.B