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数学英语 23 What are the Range and Standard Deviation?

by Jason Marshall Weve now talked about three methods for calculating average values: the mean, median, and mode (affectionately known as the three Ms). So, are we done? Is that everything we could ever want to know about interpreting average values?

发表于:2018-12-07 / 阅读(72) / 评论(0)

数学英语

SSS 2011-10-05

This is Scientific American's 60-Second Science. I'm Steve Mirsky. Got a minute? The 2011 Nobel Prize in chemistry goes to Daniel Schechtman of the TechnionIsrael Institute of Technology in Haifa. Schechtman discovered what are called quasicrystals.

发表于:2019-01-08 / 阅读(72) / 评论(0)

Scientific American(十)月

VOA慢速英语2009年-EXPLORATIONS - The Grand Canyon: A True Wo

VOICE ONE: I'm Steve Ember. VOICE TWO: And I'm Barbara Klein with EXPLORATIONS in VOA Special English. Today, we take you to one of the most popular and beautiful places in the United States. It is the Grand Canyon in the southwestern state of Arizo

发表于:2019-01-11 / 阅读(51) / 评论(0)

VOA慢速英语2009年（十）月

VOA标准英语2011--Ethnic Politics Split US Ethiopians

Ethnic Politics Split US Ethiopians America's Ethiopian community has grown quickly since the 1980s and one of its hubs is the northwestern state of Washington. Yet, even though they live a half world away from Ethiopia, these immigrants are still in

发表于:2019-01-14 / 阅读(130) / 评论(0)

VOA标准英语2011年(八月)

2007年VOA标准英语-US Poised to Advance in Women's World Cup Footb

By Jim Stevenson Chengdu,China 14 September 2007 The United States' women's football team has defeated Sweden, 2-0, in a crucial first round Women's World Cup game in China. VOA's Jim Stevenson watched the game in Chengdu, where the Americans put the

发表于:2019-01-20 / 阅读(89) / 评论(0)

2007年VOA标准英语（九月）

数学常用英语单词

数学常用英语单词 abbreviation 简写符号；简写 abscissa 横坐标 absolute complement 绝对补集 absolute error 绝对误差 absolute inequality 绝不等式 absolute maximum 绝对极大值 absolute minimum 绝对极小值 absolute monotonic 绝对单调 absolute value 绝对值

发表于:2019-02-08 / 阅读(151) / 评论(0)

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