[统计] 随机变量的期望值

英语沙龙:Random Thoughts-Party

Random1) Thoughts-Party Last night,pressured by well－intentioned friends,for the first time in months,I came out of writers seclusion and attended a cocktail party which is another word for a social gathering.So there I was,trapped in a crowded roo

发表于:2019-01-01 / 阅读(286) / 评论(0)

英语沙龙

Random acts of kindness

Jennifer: Hello and a very warm and friendly welcome to the first 6 Minute English of 2013. My name is Jennifer and with me in the studio for today's programme is Callum. Happy New Year! Callum: Hi Jen - happy New Year! Jennifer: Have you made any Ne

发表于:2019-01-07 / 阅读(297) / 评论(0)

六分钟英语

SSS 2008-08-08

This is Scientific Americans 60-Second Science. Im Steve Mirsky. Got a minute? Ever been woken up by the sound of the refrigerator compressor kicking on? Well, such clumsy heat exchange units featuring long metal coils may be on their way out. Becaus

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Scientific American(八)月

SSS 2008-03-19

This is Scientific Americans 60-Second Science. I am Cynthia Graber. This will just take a minute. Ants are known for working together, operating as a unit for the good of the colony. But not so fast, say researchers from the Universities of Leeds an

发表于:2019-01-08 / 阅读(264) / 评论(0)

Scientific American(三)月

VOA标准英语2010年-More US Companies Refuse to Hire Smoke

Americans who smoke are beginning to feel unwanted as federal laws prevent them from smoking in public buildings The World Health Organizations says smoking is considered a high risk factor in six of the eight leading causes of death worldwide. Medic

发表于:2019-01-08 / 阅读(197) / 评论(0)

VOA标准英语2010年(二月)

VOA慢速英语2009年-Economics Report - Nobel Recognizes Resear

This is the VOA Special English Economics Report. Economists usually study markets. Now, two Americans have won the Nobel Prize in economics for not studying markets. They will share almost one and a half million dollars for their analysis of econom

发表于:2019-01-11 / 阅读(220) / 评论(0)

VOA慢速英语2009年（十）月

Egypt Parliamentary Poll Expected to Bolster Sissi

Egypt Parliamentary Poll Expected to Bolster Sissi CAIRO Egypt wrapped up its parliamentary election Wednesday, and results are expected to show a win for supporters of President Abdel Fattah el-Sissi. Some analysts, however, say widespread low turno

发表于:2019-01-14 / 阅读(186) / 评论(0)

VOA标准英语2015年(十二月)

AGRICULTURE REPORT - Big Harvests Expected for Major U.S. Cr

AGRICULTURE REPORT - Big Harvests Expected for Major U.S. Crops; May Add to Pressure on Prices By Mario Ritter Broadcast: Tuesday, August 31, 2004 This is Gwen Outen with the VOA Special English Agric

发表于:2019-01-30 / 阅读(198) / 评论(0)

农业与发展

ECONOMICS REPORT - U.S. Interest Rates Expected to Rise at t

ECONOMICS REPORT - U.S. Interest Rates Expected to Rise at the End of June By Mario Ritter Broadcast: Friday, June 18, 2004 This is Bob Doughty with the VOA Special English Economics Report. Financial

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健康与经济

Kerry Expected to Win Wisconsin Primary

Kerry Expected to Win Wisconsin Primary Greg Flakus Voters are going to the polls in the Midwestern state of Wisconsin in a primary contest that could represent the end of at least one candidacy for t

发表于:2019-01-31 / 阅读(222) / 评论(0)

VOA2004（上）--各类新闻

VOA常速英语2007年-S. Korea Expected to Declare Oil Spill Coastlin

By Kurt Achin Seoul 10 December 2007 South Korean officials say they will declare a long stretch of the country's western coastline a disaster area. The move makes residents and businesses eligible for compensation as an enormous oil spill devastates

发表于:2019-02-01 / 阅读(171) / 评论(0)

VOA常速英语2007年（十二月）

2007年VOA标准英语-2007: Expected to be Hotter than 2006

By Paul Sisco Washington, DC 08 January 2007 watch Climate report Oil prices are at their lowest levels since mid-2005. That's the good news - or is it? Unseasonably warm weather is responsible for premature cherry blossoms Stronger typhoons, more f

发表于:2019-02-02 / 阅读(215) / 评论(0)

2007年VOA标准英语（一月）

每日一词【891】random：随机、任意的

今天我们要学的词是random。 Random, 是随机、任意的意思。The firefighters have to undergo a random drug test once a year, 消防队员每年要接受一次是否服用毒品的抽查。The boxer refused to submit random blood tests

发表于:2019-02-03 / 阅读(261) / 评论(0)

英语每日一词

学个词Learn a Word 第891期 Random

发表于:2019-02-03 / 阅读(172) / 评论(0)

英语单词荟萃

Growth Expected to Slow in World's Largest Economies

Growth for the world's biggest economies is expected to stall in the last three months of this year, according to the Paris-based Organization for Economic Cooperation and Development. The new findings come before a key meeting of finance ministers f

发表于:2019-02-06 / 阅读(154) / 评论(0)

英语新闻

VOA常速英语2008年-Maoists Performing Better than Expected as Nepa

By Steve Herman Kathmandu 11 April 2008 Vote counting is under way in Nepal following the nation's historic constituent assembly election. Officials say preliminary reports indicate a high turnout and a low level of vote manipulation. VOA Corresponde

发表于:2019-02-07 / 阅读(180) / 评论(0)

VOA常速英语2008年（四月）

29 Ways to Carry Out Random Acts of Kindness Every Day

29 Ways to Carry Out Random Acts of Kindness Every Day The time has come when we cannot just rely on others to make the world a better place each one of us has to do our bit. It is therefore time for people to be more and more aware about their Perso

发表于:2019-02-07 / 阅读(184) / 评论(0)

阅读空间

美国国家公共电台 NPR United Against Trump, May Day Protests Expected To Swell

RACHEL MARTIN, HOST: It's May Day. Demonstrators will march in support of workers rights around the world today. Here in the U.S., those marches are expected to draw larger than usual crowds because of President Trump's efforts to crack down on illeg

发表于:2019-02-13 / 阅读(173) / 评论(0)

2017年NPR美国国家公共电台5月

大纲重点词汇复习

第一讲a-c, 第二讲d-h, 第三讲i-o, 第四讲p-s, 第五讲t-z 词汇复习第一讲a-c 1. 识记词汇 1. Some of the old traditions have been ____ as time goes by. [A] abandoned [B] abolished [C] absorbed [D] abused 2. You cant gain ____ to t

发表于:2019-02-13 / 阅读(182) / 评论(0)

实用英语

英闻天下——104 Flu Season Peak Expected for North China

Health official says the flu season that started in China's northern provinces in December is expected to peak with infections in the next few weeks. However, Ministry of Health spokesman Deng Haihua said the expected peak infection levels will not r

发表于:2019-02-14 / 阅读(195) / 评论(0)

英闻天下

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a-c machive

abatement of pollution

alternate channel interference