An Intelligent Car

Driving needs sharpeyes, keen ears, quick brain, 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）driver in the smart car. Thisvirtual driver has "eyes",

"brains","hands"and"feet",too.Theminicameras_________(2)each side of the

car arehis"eyes",which_________(3)the road conditions ahead of it.They watch

the_________(4)tothe car's left and right.There is also a highly automatic driving

_________(5)in thecar. It is the built-in computer,which is the virtual driver's

"brain".His"brain"_________(6)thespeeds of other moving cars near it and

analyzes theirpositions.Basing on this information,it chooses the_________(7)path

for the intelligentcar,and gives instructions to the"hands"and"feet"to actaccordingly.

In this way,thevirtual driver_________(8)his car.

What is the virtualdriver's best advantage?He reacts_________(9).The

minicameras arebringing_________(10)continuously to the"brain".It completes the

processing of theimages within 100 milliseconds._________(11),the world's best

driver needs at leastone second to react.Besides,when he takes_________(12),he

needs one moresecond.

The virtual driveris really wonderful.He can reduce the accident_________(13)

considerably onexpressways（高速公路）.Inthis_________(14),can we let him have

the wheel at anytime and in any place?Experts_________(15)that we cannot do that

just yet.His abilityto recognize things is still limited.He can now only drive an intelligent

car on expressways._________(4)

A.police

B.traffic

C.pets

D.trees