听力首页 听力教程 VOA慢速 英语歌曲 外语下载 英语小说 英语词典 在线背单词 听力论坛 韩语学习
听力专题 英语教材 VOA标准 英语动画 英语考试 资源技巧 英语翻译 单词连连看 听力家园 德语学习
听力搜索 英语导读 BBC英语 英语视频 英语电台 英语QQ群 外语歌曲   英语游戏 英语网刊 日语学习
当前位置: 英语听力论坛 » 【四级教室】 » 四级练习2013.01.13
返回列表 发帖

四级练习2013.01.13


       
       





Good locks on all outside doors and first floor windows are essential to a home’s security and will go a long way towards discouraging burglars. (1)_________________________. Although this will not always prevent entry by a professional burglar, it is often enough to scare off thieves who account for a high percentage of residential break-ins。
  Security alarm systems have all been available for many years and have long been common in commercial and industrial establishments and in large homes. But until the last few years, these system were almost always professionally installed because they required complicated wiring techniques, individualized design and sometimes lots of carpentry---all of which made them expensive。
  (2)_________________________. These systems come with detailed installation instructions and usually do not require inside-the-wall-wiring。






本帖隐藏的内容需要回复才可以浏览

返回列表