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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 2008-04-28

This is Scientific American's 60-Second Science. I'm Chirisopher Intagliata, got a minute? But mum, that's not fair! sound familiar? Even as children we hate getting gypped, whether it's fewer slices of pizza or lousy presents from Santa. More surpri

发表于:2018-12-24 / 阅读(54) / 评论(0)

Scientific American(四)月

CNN 2010-01-04

Hi! Happy new year! We hope you had a wonderful break. My name is Carl Azuz, and CNN Student News is kicking off 2010 right here, right now. First up, U.S. government closes its embassy in the Middle Eastern country of Yemen, and that is because of s

发表于:2019-01-08 / 阅读(109) / 评论(0)

CNN2010年(一)月

SSS 2009-02-11

This is Scientific American's 60-Second Science. I'm Christie Nicholson . Got a minute? The lure of gambling clearly comes from the chance of winning. But how exciting is it to almost win? A study in the February 12th issue of the journal Neuron look

发表于:2019-01-08 / 阅读(65) / 评论(0)

Scientific American(二)月

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 2007 0207a

This is the VOA Special English Health Report. Researchers find stroke victims who easily quit smoking after suffering injury to a part of the brain. Chemical dependency can result from many things: alcohol, caffeine, illegal drugs like cocaine, lega

发表于:2019-01-11 / 阅读(51) / 评论(0)

VOA慢速英语2007年（二）月

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