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短文:統(tǒng)計(jì)學(xué)簡(jiǎn)介
統(tǒng)計(jì)學(xué)Statistics There were two widely divergent influences on the early development of statistical methods. Statistics had a mother who was dedicated to keeping orderly records of govern...
體育:阿姆斯特朗之旅繼續(xù)
體育:阿姆斯特朗之旅繼續(xù)Lance Armstrong is riding on even though the 7th Tour De France champion broke his collarbone in a bicycle race spin on Monday. His manager says that’s not gonna stop him
背誦美文——化石
A Rare Fossil RecordThe preservation of embryos and juveniles is a rate occurrence in the fossil record. The tiny, delicate skeletons are usually scattered by scavengers or destroye
二氧化碳能增加食欲
短文Carbon dioxide is a potent greenhouse gas. Levels of carbon dioxide, or CO2, in the atmosphere are increasing at an unprecedented rate. But what impact do higher CO2 levels have on plants?...