对角的

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(147) / 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(211) / 评论(0)

Scientific American(十)月

词汇资料-英语单词词根词典（10）

DIA through,between,across 穿越,居中字首 dia 源起希腊文介系词与副词dia,为through 或 between 之意. 这个字首在希腊文中已拥有不少单字. 如dialect n. [方言] 和diale

发表于:2019-01-11 / 阅读(118) / 评论(0)

考研英语

职业技术英语口语第71期:工作场所安全警告标志

Warning signs 警告标志 This is the machine hall. Do you notice that sign over there - the red circle with a diagonal line through it? It means you mustnt smoke here. A blue circle shows something is compulsory - so that sign over there means you

发表于:2019-01-14 / 阅读(163) / 评论(0)

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automatic burner control (abc)

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