a我考网

 找回密码
 立即注册

QQ登录

只需一步,快速开始

扫一扫,访问微社区

查看: 124|回复: 0

[考试试题] 英语专业八级改错模拟题(三)

[复制链接]
发表于 2012-8-14 11:54:21 | 显示全部楼层 |阅读模式
  The telephone system is a circuit-switched network. For much of the history of the system, when you placed (26)6 Q; C, M% `9 U) f  Z9 `: P, E
  a call, you were renting a pair of copper wires that ran continuously from your telephone to the other party’s phone. You had excluding use of those wires during the (27)
! ?6 I; u  ^% g5 s% e  call; when you hung up, they were rented to someone else. Today the transaction is more complicated. ( your call may well possess a fiber-optic cable or a satellite with hundreds of other calls), but more conceptually the system (28)
. u: h; A6 w9 X, j! Q  still works the same way. When you dial the phone, you get a private connection of one other party. This is an alternative network architecture called (29)
( C6 Q& v* Y5 R4 _! S  packet switching, in which all stations are always connected to the network, but they receive only the messages addressed to them. It is as if your telephone was always tuned in to (30)
- h' q6 z- R% z+ _1 n) h  thousands of conversations going on the wire, but you (31)& `1 o) d6 S* W( T# n% P
  heard only the occasional word intended to you. Most (32)
5 A8 \2 Y! a  U) P4 j  computer networks employ packet switching, because it is more efficient than circuit switching when traffic is heavy. It seems reasonable the existing packet-switched (33)
% B: N" d* P6 a0 G6 p; P% i+ v  network will grow, and new one may be created; they could (34)! T* ?- E- f! D6 [2 Z9 X- N
  well absorb traffic that would otherwise go to the telephone system and thereby reduce the need for telephone numbers. (35)* ^" h, }4 V; R) d7 K3 w
  答案:
" {, f* A* m0 `9 B# g  26.much改为most
' B8 c0 Z  F; p# Q) ]8 H  27.excluding改为exclusive
8 n1 E: S7 f' K& ]1 h  28.more
/ N. E' Y% M- J$ K  29.This改为There5 L2 D) t" I5 D' n; @
  30.was改为were
2 ?$ c) y# n. R- ]/ s3 X& I6 h  31.going后加by$ I+ C0 Z% n3 K3 l6 ~) \
  32.to改为for& ^; [6 J# I! x  L( n- O9 ]. b
  33.reasonable后加that
7 e- q: |  y" e* w8 {; h4 r4 n0 g  34.one改为ones
5 K  n, q4 {! ~  35.need改为demand
回复

使用道具 举报

您需要登录后才可以回帖 登录 | 立即注册

本版积分规则

Archiver|手机版|小黑屋|Woexam.Com ( 湘ICP备18023104号 )

GMT+8, 2024-11-1 07:26 , Processed in 0.545967 second(s), 22 queries .

Powered by Discuz! X3.4 Licensed

© 2001-2017 Comsenz Inc.

快速回复 返回顶部 返回列表