第二节：完形填空(共20小题；每小题1、5分，满分30分)
Computers
have been taught to act and speak, and now the trick is to get them to listen
---- to understand spoken words. So far speech 36
system has been used by workers who need to enter data(数据) into a computer while their hands and eyes are 37
occupied.
The
recognition of a limited vocabulary of single words from a single speaker is
pretty much 38 problem. Some systems, however, have
trouble 39 the noise of crumpling(揉) paper from the 40
of a human voice.
Speakers
of independent systems that can recognize the same word 41
is spoken by many different people can be built by sampling(提供样品)how several people say the same words 42
storing several patterns for each word. But the 43
for errors are greater and the vocabulary must usually be 44
. Even more difficult is continuous speech. People 45
running words together and even changing some wounds when they
speak, so the computer doesn’t know when one word ends and another 46
, making the process much less 47
. It was reported that it took an hour on the largest computer in 48
use to recognize one second of continuous speech.
Some
attempts have been made to
49 continuous speech
recognition by 50 the computer some rules of grammar
to restrict(限制)which
word can follow 51 other word. A device(装置)has been developed that has a 5,000-word
vocabulary but 52 the speaker to 53
between words.
These
devices, 54 at the moment, will represent the
first applications(应用)of
what is considered a 55 but extremely difficult technology.
36. A.
producing B. acting C.
recognizing D.
teaching
37. A.
other than B. rather than C.
instead D.
otherwise
38. A. a solved B.
an impossible C. an unsolved D.
an unpractical
39. A.
preventing B.
separating C. selecting D.
telling
40. A. noise B.
sound C. speech D.
words
41. A.
as B.
when C. what D.
which
42. A. as B.
while C. and D.
but
43. A.
possibility B. chances C.
mistakes D.
fortunes
44. A.
limited B.
enlarged C.
multiplied D.
great
45. A.
would B.
feel like C.
stick to D.
are used to
46. A.
heads B.
starts C. ends D.
concludes
47. A.
easy B.
uneasy C. difficult D. different
48. A.
common B.
continuous C. current D.
past
49. A.
clean B.
make C. correct D.
improve
50. A.
storing B.
saving C. giving D.
suggesting
51 A. which B.
the C.
some D.
still
52. A.
takes B.
requires C.
orders D.
requests
53. A.
choose B.
hesitate C.
rest D.
pause
54. A.
however rapid B. no matter how slow C. though rough D.
however
55. A.
satisfactory B.
costly C. promising D.
far-fetched