单词:water-fall theory
单词:water-fall theory 相关文章
Lesson 27: [00:03.58]Let's Do an Experiment! [00:07.24]One Experiment,Two Theories [00:11.81]A theory is an idea.A theory predicts what will happen. [00:18.57]An experiment shows what happens. [00:23.25]BRIAN:Did you read about this experiment,Danny?
[00:08.59]Great scientists [00:12.25]John snow defeats king cholera [00:19.38]John snow was a well-known doctor in London--- [00:25.42]so famous, indeed, that he attended queen Victoria to ease the birth of her babies. [00:33.46]But he became inspire
Atmospheric pressure can support a column of water up to 10 meters high. But plants can move water much higher; the sequoia tree can pump water to its very top more than 100 meters above the ground. U
[ti:UNIT 4 Look into Science! Lesson 26: One Wet Danny?] [0:00.493]UNIT 4 第四单元 [0:02.588]Look into Science! 走进科学! [0:04.930]Lesson 26: 第26课: [0:06.840]One Wet Danny? 丹尼湿透了吗? [0:09.028]THINK ABOUT IT! 想一想 [0
Todd: So, Al, we're going to talk about water. How much water do you drink every day? Al: I guess about three liters, so six of those 500 millileter, five or six of those 500 millileter bottles. Todd: Yeah, that's a lot. That's about what I drink. Ye
Wegener developed the theory that the world's continents had once come together in a single landmass he called Pangaea, where flora and fauna had been able to mingle, before the continents had split apart and floated off to their present positions. A