An intelligent car" T/ l+ ^5 M" w k, U7 P# l
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?% b2 ]6 N* u* ^8 T
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 car’s left and right. There is also a highly __4__ driving system in the car. It is the built-in computer, which is the virtual driver’s “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 “hands”and “feets”to act accordingly. In this way, the virtual driver controls his car.$ P+ u8 E9 w4 y: ~
What is the virtual driver’s 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 world’s best drier __11__ needs one second to react. __12__, when he takes action, he needs one more second.
; V0 ]9 V; R) j" T& W3 n6 @ 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.
) A* U0 J( n' G1 s% V 1. A. these B. them C. this D. that
! b+ X/ @6 L: z5 m N( Z+ v 2. A. within B. above C. to D. on
) j2 o; s$ f8 z" ] 3. A. police B. traffic C. trucks D. buses7 E) J0 D2 {2 J: D$ D, x
4. A. mechanical B. moveable C. automatic D. electronic
7 W* H8 m, k2 R/ F 5. A. another B. other C. each other D. one another: r+ P5 v. l, G. a; j* c. R$ q
6. A. line B.lane C. track D. path
( r8 j7 n! K- T. \) j( V. F 7. A. space B.locations C. instructions D. time
) g* B( [. d; \9 M7 @8 _9 X6 k" P! T 8. A.quickly B. cleverly C. virtually D. safely
5 ]" K) D3 o, a$ V8 c! a# Z/ S 9. A.bringing B. taking C. sending D. carrying. c* ~& o' @( }: Q8 [6 A
10. A. selects B. completes C.uses D. tests
! S/ O$ [3 b" L& X' r* Z7 p 11. A. at least B. at most C. at last D. at best
e( P3 y* t( B7 T! U5 [# r- r 12. A. So B. However C. Besides D. Therefore0 l( [" y2 I# l
13. A. count B. amount C. digit D. rate
8 `$ f; V3 ]& J* g/ W, {7 r 14. A. warn B. suggest C. invite D. check
v9 B. G* v1 o 15. A. unknown B. few C. untested D. limited
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发表于 2012-8-15 23:30:26
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