标签：听力文摘 相关文章

英语听力文摘 English Digest 516、对扶手说再见

Farewell to Arms 对扶手说再见 Good afternoon, this is your captain speaking. We are at cruising altitude and will be in flight for another three hours, so youd better get comfortable. That means figuring out who gets the arm rest you, or your n

发表于:2018-12-31 / 阅读(54) / 评论(0) 分类 英语听力文摘 English Digest

英语听力文摘 English Digest 518、地球同步卫星（二）

A Stationary Satellite, part 2 A geostationary satellite orbitsthe planet at the same rate as the planet rotates, so the satellite is always over the same patch of ground. Cool! you say. Id like to have one of those about twenty feet over my house. S

发表于:2018-12-31 / 阅读(56) / 评论(0) 分类 英语听力文摘 English Digest

英语听力文摘 English Digest 517、地球同步卫星（一）

A Stationary Satellite, part 1 Some of the best devices in science have been anticipated by science fiction writers years before they existed. Occasionally a writer comes up with an idea that can be put into practice within their lifetime! Such is th

发表于:2018-12-31 / 阅读(57) / 评论(0) 分类 英语听力文摘 English Digest

英语听力文摘 English Digest 580、什么是条件反射？

What Are Reflexes? If youve ever blinked at a sudden light, jerked your hand away from something hot, or jumped at a loud noise, then you know that these are not actions we consciously plan. Rather, they happen involuntarily. Such sudden, unconscious

发表于:2018-12-31 / 阅读(64) / 评论(0) 分类 英语听力文摘 English Digest

英语听力文摘 English Digest 605、冰山一角

Everyone knows the story of the Titanic, the great ocean liner that struck an iceberg and sank to the bottom of the Atlantic. Less widely known is the icebergs story: where did it come from, and how did it get in the way of the ship? Although the vas

发表于:2018-12-31 / 阅读(64) / 评论(0) 分类 英语听力文摘 English Digest

英语听力文摘 English Digest 603、听诊器是怎么发明出来的？

In the early 1800s, a French physician named Ren Laennec had a dilemma. He needed to listen to the heart sounds of a young woman with signs of heart disease. But the only method of listening to heart sounds known to Western medicine at the time was s

发表于:2018-12-31 / 阅读(49) / 评论(0) 分类 英语听力文摘 English Digest

英语听力文摘 English Digest 609、人类语言的起源

Scientists have searched for the origins of human speech in the hoots, grunts, and other vocalizations made by primates. It would seem to make sense, after all, that such sounds may be related to the more varied and articulated sounds we humans make.

发表于:2018-12-31 / 阅读(43) / 评论(0) 分类 英语听力文摘 English Digest

英语听力文摘 English Digest 537、中年发福伤不起！

The Mathematics Of Middle-Age Spread Lets say youre an 18 year old male who runs every other day, logging 12 miles a week. Now fast-forward to your late 40s. Your eating habits are the same. To maintain your high school weight, how many miles a week

发表于:2018-12-31 / 阅读(46) / 评论(0) 分类 英语听力文摘 English Digest

英语听力文摘 English Digest 533、为何冰箱会发出声音？

Why refrigerators hum? Why refrigerators hum，on toay's moment of science.On the recent program we have discussed how fluorocarboncoolant cools your food by coming to a boil in coils hidden in your fridge. How is this possible? When you boil water o

发表于:2018-12-31 / 阅读(71) / 评论(0) 分类 英语听力文摘 English Digest

英语听力文摘 English Digest 460、气候变化与小提琴

Why do Stradivarius violin s sound so good? 为什么史特拉第瓦里小提琴声音那么美妙？ A:What did i tell you？ B:You're right Yaoyao.This is a beautiful piece. A:It should be. B:What's so special about Stradivarius violin s ? A:Thats

发表于:2019-01-26 / 阅读(52) / 评论(0) 分类 英语听力文摘 English Digest

英语听力文摘 English Digest 471、你的心脏够强大吗？

Bradycardia Don: Yal, isn't normal heart rate somewhere between sixty to one hundred beats per minute？ Yal: That's right, Don. Why? D: This would be the one time you don't correct me. My heart rate is only 44 beats per minute. That means I have bra

发表于:2019-01-26 / 阅读(60) / 评论(0) 分类 英语听力文摘 English Digest

英语听力文摘 English Digest 270、单腿站立的鸟

Cold Feet and Hot Wings 鸟通常只在休息或睡觉的时候才单脚站立。鸟类学家认为，他们这么做是为了减少能量的消耗，并把一只脚收到翅膀之下休息，通常他们会交替使用两只脚独立。披着一身羽

发表于:2019-03-09 / 阅读(123) / 评论(0) 分类 英语听力文摘 English Digest

英语听力文摘 English Digest 258、“哈比人”

Small People 佛罗勒斯人（Homo floresiensis）是近年发现的一种史前人类，为人属的一种，主要特征是体型小，大脑小，因此也被化名作哈比人。 一般认为他们与现代人类曾经生活在一个时代。他们

发表于:2019-03-09 / 阅读(104) / 评论(0) 分类 英语听力文摘 English Digest

英语听力文摘 English Digest 264、马腿为什么那么瘦？

Skinny Legs and All Why do horses have skinny legs? Find out on this Moment of Science. Why do horses have skinny legs? Okay, they arent entirely skinny its mostly the (1)bottom half, with a big muscle up at the top.Thats odd. Human legs are kind of

发表于:2019-03-09 / 阅读(123) / 评论(0) 分类 英语听力文摘 English Digest

英语听力文摘 English Digest 265、人性的弱点

Understanding Abu Ghraib 阿布格莱布监狱始建于上个世纪70年代，在萨达姆时期是用来关押伊拉克平民的监狱，萨达姆政府曾在此关押过因涉嫌与1982年杜贾尔村针对萨达姆的未遂暗杀案有关的平民，

发表于:2019-03-09 / 阅读(114) / 评论(0) 分类 英语听力文摘 English Digest

英语听力文摘 English Digest 268、你为何要睡觉？

You Snooze or You Lose 几乎每个人在忙碌了一天之后，都要香香地睡上一觉。当然也有活了一辈子不 睡觉的人，但那是极个别的。人要睡觉是一种生理反应，是大脑神经活动的一部分， 是大脑皮质

发表于:2019-03-09 / 阅读(194) / 评论(0) 分类 英语听力文摘 English Digest

英语听力文摘 English Digest 229、夏天的风

Summer Breeze, Makes Me Feel Fine 风是大家最熟悉的自然现象，要了解风的形成必须了解包围着地球的大气的运动。大气的流动也像水流一样是从压力高处往压力低处流。太阳能正是形成大气压差的原

发表于:2019-03-09 / 阅读(194) / 评论(0) 分类 英语听力文摘 English Digest

英语听力文摘 English Digest 232、电视“雪花”

Better Than Barney 某天夜里，你一觉醒来发现电视机忘了关，节目却已播完，电视屏幕上嘶嘶地闪着雪花，也许你不会想到，再普通不过的雪花噪音竟包含来自137亿年前宇宙大爆炸的遗物微波背景

发表于:2019-03-09 / 阅读(209) / 评论(0) 分类 英语听力文摘 English Digest

英语听力文摘 English Digest 393、单亲蜜蜂王国

Fatherless Honeybee s How male honeybee s can be without fathers? The reason lies in whats called a haploidiploid system of sex determination. Approximate ly one-fifth of the animal kingdom, including ants and wasp s , use this system. What it boils

发表于:2019-03-09 / 阅读(169) / 评论(0) 分类 英语听力文摘 English Digest

英语听力文摘 English Digest 405、可以喝的雨水

Acid Water Yal: What are you doing outside, Don? It's about to rain. Don: I'm setting out bottles. Y: I can see that. But why? D: For my new business venture. Bottled rainwater! Y: As in living plastic bottles out in the rain and then selling them as

发表于:2019-03-09 / 阅读(276) / 评论(0) 分类 英语听力文摘 English Digest
最新学习文章
热门学习文章