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数学英语 08 How to Make Box and Whisker Plots

图片1 图片2 图片3 by Jason Marshall Weve now talked about several different useful ways for looking at and understanding a group of numbers. The mean, median, and mode are great for determining the average value, and last time we learned that t

发表于:2018-12-07 / 阅读(43) / 评论(0)

数学英语

SSS 2010-09-08

This is Scientific Americans 60-Second Science, Im Molly Webster. Got a minute? Some consumers buy organically grown foods because they believe the products are healthier, tastier and better for the environment. But is this assessment true? To find o

发表于:2019-01-08 / 阅读(52) / 评论(0)

Scientific American(九)月

牛津少儿英语 let's chant 51 - Big Box, Little Box (solo) - 29 s.

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发表于:2019-01-28 / 阅读(75) / 评论(0)

Let's chant Let's sing

牛津少儿英语 let's chant 52 - Big Box, Little Box (group) - 25 s.

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发表于:2019-01-28 / 阅读(81) / 评论(0)

Let's chant Let's sing

想要打击城市犯罪?多种树吧

Can a tree help prevent crime? It just might. Two new studies, led by US Forest Service researchers, took a closer look at urban green space in Philadelphia, Baltimore and Youngstown, Ohio. In each of these cities, adding green space to crime-ridden

发表于:2019-02-01 / 阅读(35) / 评论(0)

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美国学生人类历史第89期:罗马帝国的兴起(2)

In the year 203 B.C. Scipio had crossed the African Sea and had carried the war into Africa. 公元前203年，西皮奥率军渡过阿非利加海，将战火烧到非洲。 Carthage had called Hannibal back. Badly supported by his mercenaries, Hann

发表于:2019-02-21 / 阅读(39) / 评论(0)

美国学生人类历史

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