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2014.01.06
返回列表 发帖

四级练习2014.01.06


       
       




But even the lowest levels can do serious damage. There is no level of radiation that is completely safe. (1)___________________________________
This is the case when only a few cells are hit, and if they are killed immediately. Your body will replace the dead cells with healthy ones. (2)___________________________________ and if they reproduce themselves, you may be in trouble. They reproduce themselves in an unusual way. They can grow into cancer. Sometimes this does not appear for many years. This is another reason for some of the mystery about nuclear radiation.
Serious damage can be done without the knowledge of the person at the time that damage has occurred. (3)_____________________________________________then die of cancer ten or twenty years later as a result. Or a child can be born weak or easy to be seriously ill as a result of radiation absorbed by its grandparents.




本帖隐藏的内容需要回复才可以浏览

返回列表