单词:carbonate of potash
[网络] 碳酸钾;珍珠灰;粗碳酸钾
单词:carbonate of potash 相关文章
The little splints of wood which we call matches are made out of deal or pine wood which has been soaked in melted paraffin wax to make it burn more easily. 这种被我们称之为火柴的薄木片由欧洲赤松(松树)制成, 在液体的石蜡
发表于:2018-12-18 / 阅读(74) / 评论(0)
英国学生科学读本
This is the VOA Special English Development Report. One of the best ways to protect yourself and other people from getting sick is to wash your hands with soap. To make soap, you need three main things: oil, water and lye. The oil can come from anim
发表于:2019-01-11 / 阅读(102) / 评论(0)
VOA慢速英语2008年(十二)月
日常生活中,意外伤害很难避免。如果我们不及时救治或者操作不当的话,很可能会对自身或者他人的身体造成伤害,所以,掌握一些急救常识非常必要。下面我们来看一段关于学习急救的对
发表于:2019-02-26 / 阅读(109) / 评论(0)
英语口语