作者:蒋迅 来源: 5 Cool Science Experiments You Should Check Out On YouTube 1. 液氮爆炸 ( Liquid Nitrogen Explosion) 2. 在微重力环境中的水滴里加入阿卡-塞尔特斯 ( Alka-Seltzer Added To Water Drop In Micro-Gravity) 3. 干冰泡泡 ( Dry Ice Bubble) 4. 液体光 ( Liquid Light ...
作者:蒋迅 HMH Fuse's Homework Help feature provides step-by-step support via hints and examples. Source: The Centre Daily Times 据美国 国会山新闻 报导,加州教育局和出版课本的出版商 Houghton Mifflin 公司联手试点用iPad替代传统的数学课本。今年,他们将在 Long Beach、Riverside、Fresno 和 San ...
作者:蒋迅 Source: NASA ASK 有一天在阅读NASA的一篇文章“ Ten Systems Engineering Lessons Learned ”(系统工程的十条经验) 时看到了下面的一段话: When you are in college and you copy someone else's work, it's called plagiarism, and it can get you kicked out of school. ...