An intelligent car3 h% ?9 g0 D+ T" [2 H; G. h
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?
* c3 \* C- B& |0 c0 `- n* m0 n 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.
3 v3 K+ o* Z; l8 |2 D 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.; u" v" N& C( H8 D8 G; k# ?
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.. g8 L% H" F; n$ V$ G; a
1. A. these B. them C. this D. that9 J4 @. T% W: U; N
2. A. within B. above C. to D. on
" u2 y5 G6 Q; k1 d4 M 3. A. police B. traffic C. trucks D. buses
, N2 v4 j5 |+ f6 A, ^ 4. A. mechanical B. moveable C. automatic D. electronic" h/ m/ y7 f- B# c& _$ v
5. A. another B. other C. each other D. one another
7 y: A" |- n) t* {. O% b 6. A. line B.lane C. track D. path* Y1 I" K, n0 r2 k1 S6 K/ N; U
7. A. space B.locations C. instructions D. time( R3 X$ Q+ t6 B- Z1 [
8. A.quickly B. cleverly C. virtually D. safely
# D' b0 b% B! }) K. l) t" f 9. A.bringing B. taking C. sending D. carrying
& M# ], j! e! X- a0 J6 C: ]9 D# K4 X 10. A. selects B. completes C.uses D. tests
1 p8 z* P8 H c9 T0 B 11. A. at least B. at most C. at last D. at best
: y4 ]. S6 b& k' t 12. A. So B. However C. Besides D. Therefore
; N, M5 M% Z! O5 W! Z, P5 e5 G X 13. A. count B. amount C. digit D. rate
) w; r; ~" |) \: d1 A# V' v) \- e 14. A. warn B. suggest C. invite D. check- A4 W$ t* ]# a
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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