An intelligent car& _* U* \2 _$ R U" q# o
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?
7 A |8 {" ?/ A: m% n6 R8 k1 H 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." F/ W/ E' c- H4 C$ L2 j0 {. U% G
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." f3 v d& J0 Q7 K, V# 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.
: w( P5 f4 g6 H" q5 m2 ]$ \# t, \ 1. A. these B. them C. this D. that7 b) W7 j9 i8 N" d# Y
2. A. within B. above C. to D. on
& O# T3 A. ^4 {( ?$ U 3. A. police B. traffic C. trucks D. buses6 w2 m' `9 F- U2 O; @4 Q% {
4. A. mechanical B. moveable C. automatic D. electronic$ Y& X& ], v" {+ @: D1 _
5. A. another B. other C. each other D. one another" f7 D/ Z* e8 V7 D& Y, t/ {: X1 s
6. A. line B.lane C. track D. path
0 a3 Z! o+ h0 \$ X7 l 7. A. space B.locations C. instructions D. time
8 o" w# o, A( d. Y8 a0 q2 z6 F n 8. A.quickly B. cleverly C. virtually D. safely
" u4 }2 b; t3 y) i0 q 9. A.bringing B. taking C. sending D. carrying) T$ D3 e& P7 X; A/ N
10. A. selects B. completes C.uses D. tests) U& P# G* ?2 r& ^- L% M
11. A. at least B. at most C. at last D. at best) ]" R4 k2 r: n2 M% v# i
12. A. So B. However C. Besides D. Therefore+ w$ _2 f9 i# ]( g3 l9 `6 A
13. A. count B. amount C. digit D. rate
; l( {, X2 u* W7 }' L 14. A. warn B. suggest C. invite D. check
, o J Z+ ?, f& Q 15. A. unknown B. few C. untested D. limited$ u, b, T) @+ s; r/ v
, v- i# \% V( P+ j0 `4 K
1 V: h1 f0 ~/ B3 S, g4 R |
发表于 2012-8-15 23:30:26
楼主