The latitude of the island is 20 degrees south.该岛的纬度是南纬20度.This city is close to the fortieth parallel of north latitude.这个城市靠近北纬40度.She was given considerable latitude in how she spent the money.在如何花这笔钱的问题上她有很大的自由....
以低含氢硅油 、 不饱和聚醚 、 一氯乙酸和二甲胺为原料, 制备得阳离子有机硅油.The silicone quaternary was synthesized reaction of - H silicone, unsaturated - ether, chloroacetic acid, dimethylamine.双长链烷基甲基叔胺是脂肪醇和二甲胺催化胺化反应的主要 副产物.Dialkylmethylamines are the ...
Made from bamboo charcoal calcined in high temperature, it has unique healthy.内芯所采用的高温竹炭具有独特的保健作用.The BET specific surface area reaches 477.7 m 2 ? g - 1 for NiO calcined at 523 K.结果表明,在523K下焙烧得到的氧化镍BET比表面达到 477.7m ~2·g~...