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2015.01.26
返回列表 发帖

四级练习2015.01.26


       
       




After studying the X-rays from the object, Patnaude says there's no direct evidence that the supernova 1979C (1)_____________________________. The X-ray signature detected by NASA's orbiting Chandra telescope provides only indirect evidence. But his colleague Avi Loeb says that if it is a black hole, it could provide important evidence of the energy sources that power a supernova. It also provides an opportunity (2)_____________________________that exist in the universe:
"Very high densities, close to that of an atomic nucleus. And we cannot really reproduce these conditions in the laboratory. And so by observing the sky, we're able to learn about environments ... that can only be observed out there, in the universe." Loeb and Patnaude will be publishing their (3)_____________________________.




本帖隐藏的内容需要回复才可以浏览

返回列表