标签：实验 相关文章

新东方优美背诵短文50篇 Unit27:Scientific Theories

27. Scientific Theories In science, a theory is a reasonable explanation of observed events that are related. A theory often involves an imaginary model that helps scientists picture the way an observed event could be produced. A good example of thi

发表于:2018-12-08 / 阅读(339) / 评论(0) 分类 新概念优美背诵短文50篇

振动与波18：边界条件为介质-折射率-斯内尔定律

分集介绍：本视频是关于物理光学课程的。课中主要讲解了光学中光偏相关内容，证明了光穿过不同介质的偏振角存在。通过例子分析和实验来阐述所讲知识。

发表于:2018-12-09 / 阅读(66) / 评论(0) 分类 麻省理工学院公开课：振动与波

VOA常速英语2015--宇航员为太空旅行做水下实验

Astronauts Train Underwater for Deep Space Missions 宇航员为太空旅行做水下实验 Manned deep space missions are still a long way off, but space agencies are already testing procedures, equipment and human stamina for operations in extreme

发表于:2018-12-16 / 阅读(51) / 评论(0) 分类 VOA标准英语2015年(八月)

辛沛沛NO-BOOK 辛沛沛口语初级版 Lesson 10 Allow

Lesson 10Allow 1.Please allow me to tell you the truth . 2.My father doesn't allow me to smoke . 3.Please allow me to do experiments in this laboratory . 4.I don't allow him to use my computer . 5.Passengers are not allowed to smoke . 6.My brother wo

发表于:2018-12-16 / 阅读(76) / 评论(0) 分类 辛沛沛NO-BOOK 辛沛沛口语初级版

英文书摘精选 Ben Franklin And A Very Furry Situation富兰克林与他的毛皮实验

When they hear the name Ben Franklin, many folks think of the Declaration of Independence, the Continental Congress and things like that. Not as many people remember that Franklin was an inventor . . . and a good one, too! He also did some pioneering

发表于:2018-12-28 / 阅读(54) / 评论(0) 分类 初学者听力文摘精选

国家地理-2008-07-17 Atom Smasher Safe 粒子对撞实验可能毁灭地球？

The most powerful atom smasher ever built could make some bizarre discoveries, such as new forces of nature or even extra dimensions of space, after it's switched on in August. The Large Hadron Collider, or LHC, basically consists of a ring of super

发表于:2018-12-30 / 阅读(148) / 评论(0) 分类 国家地理2008年

双语有声阅读:Sacrificed to Science? 为科学而献身

Professor Colin Blakemore works at Oxford University Medical School doing research into eye problems and believes that animal research has given humans many benefits: The use of animals has been central to the development of anaesthetics, vaccines an

发表于:2019-01-02 / 阅读(52) / 评论(0) 分类 双语有声阅读

VOA慢速英语--于亚利桑那州生物圈2号实验25周年

25 Years Later: Biosphere 2 Lives On An unusual scientific experiment ended 25 years ago when eight people walked out of a miniature Earth called Biosphere 2. Biosphere 2 is a collection of large, connected buildings in the American state of Arizona.

发表于:2019-01-03 / 阅读(88) / 评论(0) 分类 2018年VOA慢速英语(十)月

美联社新闻一分钟 AP 基因编辑婴儿研究者公开谈论实验

This is AP News Minute. Republican Senator Cindy Hyde-Smith won Mississippi Senate election run-off. She defeated Democrat Mike Espy and becomes the first women elected to Congress from Mississippi. The Chinese scientist who claimed to have help make

发表于:2019-01-04 / 阅读(166) / 评论(0) 分类 美联社新闻一分钟2018(十一)月

振动与波14：坡印廷矢量-雷利散射-极化

分集介绍：本节课所讲为振动与波。教授对电磁场的有关计算给出了详尽的说明和推导过程，并用生动的实验和图片解释光波的偏振现象，告诉我们为什么天空是蓝色的，为什么日出和日落是

发表于:2019-01-05 / 阅读(69) / 评论(0) 分类 麻省理工学院公开课：振动与波

美联社新闻一分钟 AP 密西西比火箭发动机进行实验

密西西比火箭发动机进行实验 This is AP News Minute. President Trump is expected to meet with more prospective supreme court nominees this week. He interviewed four candidates Monday, all of them federal appeals judges. Secretary of State

发表于:2019-01-11 / 阅读(129) / 评论(0) 分类 美联社新闻一分钟2018(七)月

VOA常速英语2014--荷兰实验表明盐水种植农作物成为可能

Dutch Experiment Shows Farming With Salty Water Possible 荷兰实验表明盐水种植农作物成为可能 One of the many adverse effects of global climate change is the rise of sea levels, which scientists say can increase the salinity level of f

发表于:2019-01-14 / 阅读(62) / 评论(0) 分类 VOA标准英语2014年(十一月)

2014年CRI 世卫组织赞成提供抗埃博拉实验药 俄罗斯乌克兰就人道主义援助达成协议

A World Health Organization panel of medical ethicists has ruled it is ethical to offer unproven drugs or vaccines to people infected or at risk of infection in West Africa's deadly Ebola outbreak. Meanwhile, one of three Chinese medical teams sent t

发表于:2019-01-18 / 阅读(86) / 评论(0) 分类 2014CRI中国国际广播电台

英语口语900句 10.03.对话.3.在实验室

teacher:Good afternoon,everyone. This experiment is to start at 3 o'clock. Have you gone to the instructions? student:Yes,Sir. teacher:Ok. Now,some points for attention. First of all,pay attention to safety. Now,sign your name on the lab record. And

发表于:2019-01-21 / 阅读(84) / 评论(0) 分类 英语口语900句

GRE考试解题思维综述—第二章思维指导(6)

13.Usuallythefirsttospotdatathatwereinconsistentwithotherfindings,inthisparticularexperimentsheletanumberof_______resultsslipby. A.inaccurate B.verifiable C.redundant D.salient E.anomalous KEY：E 翻译

发表于:2019-02-01 / 阅读(71) / 评论(0) 分类 英文语法词汇

科学家首次用火星"土壤"种出可食用作物

Hopes for a colony on Mars took a step forward after scientists proved it was possible to grow edible food in Martian soil for the first time. 殖民火星的希望向前迈进了一步:科学家首次证实在火星土壤上是有可能种出可食用

发表于:2019-02-09 / 阅读(56) / 评论(0) 分类 英语新闻

VOA双语新闻：专家称北韩实验导弹引擎消息可信

One of the world's foremost analysts of North Korea's ballistic missile programs says reports of missile engine testing at a newly revealed facility appear credible. North Korea is apparently able to test its missiles under more realistic conditions

发表于:2019-02-14 / 阅读(83) / 评论(0) 分类 VOA双语新闻 2008年9月

英语PK台 第472期:"被拒100天"实验克服"碰壁恐惧症"

When I was six years old, my first grade teacher had this brilliant idea. She wanted us to experience receiving gifts but also learning the virtue of complimenting each other. And she said, Why don't we just stand here and compliment each other? If y

发表于:2019-03-04 / 阅读(116) / 评论(0) 分类 英语PK台

留美老师带你每日说英文 第396期:联觉是普遍存在的

台湾籍旅美老师今天交给我们的句子是： Synesthesia is actually a really common condition, but also it's how our brains work most of the time. So you can do this really simple experiment at home to see what Synesthesia actually looks l

发表于:2019-03-05 / 阅读(165) / 评论(0) 分类 留美老师带你每日说英文
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