职称英语在线答题

每日一练：职称英语理工类每日一练(2015-3-25)
【单选题】

An Intelligent Car

Driving needs sharp eyes,keen ears,quickbrain,and coordination(协调)between hands and thebrain.Many human drivers have all(1)and can control a fast-moving car.But howdoes an intelligent car control itself?

There is a virtual(虚拟的)driverin the smart car.This virtual driverhas"eyes,""brains,""hands"and"feet,"too.Theminicameras(2)each side of the car are his"eyes,"which(3)the roadconditions ahead of it.They watch the(4)to the car's left and right.There isalso a highly automatic driving(5)in the car.It is the built-in computer,whichis the virtual driver's"brain."His"brain"(6)the speeds ofother moving cars near it and analyzes their positions.Basing on thisinformation,it chooses the(7)path for the intelligent car,and givesinstructions to the "hands"and"feet"to act accordingly.Inthis way,the virtual driver(8)his car.

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

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

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