解释为什么钡能形成过氧化物而铍则不能。Explain why barium forms peroxide but beryllium does not.普通的陶瓷元件分别是钛酸钡和锆钛酸铅.Common ceramic elements are barium titanate and lead zirconate - titanate.钡剂反流进入回肠末端.There is reflux of barium into the termi...
艾格妮丝·史沫特莱在艰难的环境下过早地结束了自己的一生.The end for Agnes Smedley came untimely and under difficult circumstances.艾格妮丝在延安这段时期,经历了许多使她感到欢快的事情.Much happiness came to Agnes in this Yan'an period.我是在1934年认识艾格妮丝·史沫特莱的.It was in 1934...
目的: 优化微波辐照法从红车轴草中提取、纯化制备染料木素的工艺条件.Objective : To screen the best method of extraction of total isoflavones from Trifolium pretense L.染料木素是大豆异黄酮, 植物化学物质的结构类似雌激素的类型.Genistein is a type of soy isoflavone, a plant chemical t...
In recent times the Faraday effect has been put to even more exciting and promising uses.目前,法拉第效应还有更令人鼓舞的,有前途的应用.I awaited Christmas Eve, and the always exciting advent of fat Santa.我等待着圣诞前夜,以及圣诞胖爷爷那总是令人兴奋的到来。...their re...
Before the race, he is fine. But afterwards he is worn out.赛前他状态很好,赛后就筋疲力尽了。She wondered where they were going to rendezvous afterwards.她想知道之后他们要去哪里约会。Shortly afterwards, cuts in defence spending forced the aerospace ind...