电力网数学模型;电力系统数学模型

走进剑桥大学第7期:没有铆钉的数学轿

The Mathematical Bridge 没有铆钉的数学轿 The Mathematical Bridge was built in 1749 by James Essex the Younger to the design of William Etheridge. It had subsequently been rebuilt to the same design in 1866 and 1905. 数学桥是1749年詹姆斯

发表于:2018-12-18 / 阅读(108) / 评论(0)

走进剑桥大学

世界节假日博览第47期:圆周率日

Pi Day is on March 14. This is the day when mathematicians and geometry enthusiasts around the world get together and celebrate the mathematical constant of Pi. There are two good reasons to hold Pi Day on March 14. The first is that in the American

发表于:2018-12-29 / 阅读(88) / 评论(0)

世界节假日博览

大学英语六级练习试卷听力 Model Test 02

Section A Directions:In this section,you will hear 8 short conversations and 2 long conversations.At the end of each conversation,one or more questions will be asked about what was said.Both the conversation and the questions will be spoken only once

发表于:2018-12-30 / 阅读(97) / 评论(0)

英语六级听力练习集锦

【听听测测】Model Test 77

There is one name in____ that ____through the English language even today. You may have ____people say, It doesn't take an Einstein to___ that or he is no Einstein. For more than fifty years, Albert Einstein has stood___ as the world____ of brain pow

发表于:2018-12-30 / 阅读(137) / 评论(0)

听听测测

60秒科学:Why Dwarf Galaxies Lack Star Power

Why Dwarf Galaxies Lack Star Power In a study in the journal Nature, researchers show that the relative lack of star density in dwarf galaxies need not conflict with standard cosmological models if you include the blast effects of supernovae. Karen H

发表于:2019-01-02 / 阅读(135) / 评论(0)

60秒科学

Schoolyard Habitats

By Jerilyn Watson Broadcast: November 20, 2003 This is Steve Ember with the VOA Special English Education Report. Educational gardens called

发表于:2019-01-02 / 阅读(108) / 评论(0)

VOA2003（下）-教育与新闻

Earthquake1 Warning System

Broadcast: May 16, 2003 By George Grow This is the VOA Special English Environment Report. Scientists in the United States have developed a computer program that they say could provide an early warnin

发表于:2019-01-02 / 阅读(117) / 评论(0)

VOA2003（上）-科技导航

北师大版高中英语模块10--Unit29(2)-5

[00:00.00]5 We all have genius within us [00:04.35]For years,scientists have speculated [00:06.66]that the talents possessed by [00:08.13]so-calledidiots savants- [00:10.46]as depicted by Dustin Hoffman in the film [00:12.97]Rain Man-may be accessibl

发表于:2019-01-10 / 阅读(283) / 评论(0)

北师大版高中英语模块10(选修)

VOA慢速英语 2008 1001b

This is the VOA Special English Health Report. Governments, businesses and other groups have promised to add three billion dollars to the fight against malaria. The promises came last week at a meeting at the United Nations in New York. The money wi

发表于:2019-01-11 / 阅读(148) / 评论(0)

VOA慢速英语2008（十）月

乌干达演示太阳能汽车

AS IT IS 2016-08-04 Ugandan Company Demonstrates Solar-Powered Bus 乌干达演示太阳能汽车 A bus powered by the suns energy has made its public debut. Kiira Motors Corporation demonstrated the new electric bus recently at a sports center in th

发表于:2019-01-12 / 阅读(132) / 评论(0)

2016年VOA慢速英语(八)月

VOA标准英语2011--Model Home Shows off Renewable Energy Te

Model Home Shows off Renewable Energy Technology in Senegal In Senegal, a model green house is showcasing renewable energy technologies as part of efforts between the Israeli and Senegalese government to improve food production and reduce dependence

发表于:2019-01-14 / 阅读(114) / 评论(0)

VOA标准英语2011年(五月)

托福听力单句训练附答案:第94期

听力题目： 7. (A). Alex did fine in calculus. (B). Calculus was hard for Alex. (C). Alex had trouble getting to math class. (D). It used to be difficult for Alex to find us. 8. (A). Why is California so popular? (B). California is my favorite st

发表于:2019-01-18 / 阅读(168) / 评论(0)

托福听力单句训练

英语口语之精华语句

1. What college are you attending? 2. What are you majoring in? /What's your major? 3. What grade /class〖年级和班级〗are you in? 4. What school did you go to? /Where do you go to school? 5. How many courses are you taking this semester? 6. I'

发表于:2019-01-21 / 阅读(321) / 评论(0)

天天商务口语

英语六级听力考试预测模拟练习6

[00:00.00]Listening Comprehension (20 minutes) [00:-1.00]Section A [00:-2.00]Directions:In this section,you will hear 10 short conversations.At the end of each conversation,a question will be asked about what was said.Both the conversation and the qu

发表于:2019-01-25 / 阅读(178) / 评论(0)

英语六级听力练习集锦

走进牛津大学第26期:牛津大学最大的学部

The Medical Sciences Division is the largest academic division in the University of Oxford, and also an internationally renowned centre for biomedical and clinical teaching and research. 医学部是牛津大学最大的学部，也是一个国际知名

发表于:2019-01-29 / 阅读(123) / 评论(0)

走进牛津大学

VOA慢速英语20060323a

EDUCATION REPORT - Intel Science Talent Search Winners AnnouncedBy Nancy Steinbach Broadcast: Thursday, March 23, 2006 I'm Steve Ember with the VOA Special English Education Report. An eighteen-year-o

发表于:2019-01-30 / 阅读(137) / 评论(0)

2006年慢速英语（三）月

英语杂谈：58 The mathematical marriage predictor

You might not think that mathematicians have anything particularly relevant to say about your love life. But you'd be wrong--if we're talking about James Murray, a mathematician at the University of Washington in Seattle who teamed up with Psychologi

发表于:2019-01-31 / 阅读(146) / 评论(0)

英语杂谈

“结石”怎么说

结石怎么说如果说，calculus（微积分）还有一层含义，即表示日常最令人痛之欲绝的结石，您会不会很很惊异？calculus（微积分）和calculus（结石）之间从词源上讲有无联系呢？今天的词海拾贝

发表于:2019-02-07 / 阅读(128) / 评论(0)

英语口语

四级阅读理解技巧

关于细节性问题（suppporting details）细节性问题是关于supporting details类的问题，通过skimming找出主题后，应进一步掌握阐述和发展主题的主要事实，或按要求找出特定细节。在回答此类问题时，

发表于:2019-02-09 / 阅读(106) / 评论(0)

大学四六级阅读

PBS高端访谈:缅怀另类的天才:约翰·纳什

HARI SREENIVASAN: Returning now to the death of Nobel Prize-winning mathematician John Nash. I'm joined by Nash's colleague and friend Robbert Dijkgraaf, director of the Institute for Advanced Study in Princeton, New Jersey. So, first off, my condole

发表于:2019-02-17 / 阅读(125) / 评论(0)

PBS访谈社会系列

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0419

administrative realist

automatic blowoff valve

average sample run length

bakemeats

ballpoint pens