how is it going钛的基础知识培训机构是什么一、钛元素Ti与人类应用数千年的金银铜铁相比，人类认识钛元素的时间并不长。1789年，人们发现了一种未知的新元素，其原子序数为22，原子核由22个质子和20-32个中子组成。6年后的1795年，一位德国化学家Martin Heinrich Klaproth在研究来自匈牙利的矿物——“金红石”（请您记住这个词）时，发现了含有这种新元素的白色氧化
⾼级英语Paraphra:1.little donkeys …..of people.P: little donkeys make their way in and out of the moving crowds,or pass through them.2.Then as you ….cloth-market.P: then as you go deeper into the market
词汇学题⽬Lecture OneLanguage Linguistics LexicologyIV. QUESTIONS1) What is lexicology?2) What is the nature and scope of English lexicology?1. Lexicology is a branch of linguistics, inquiring into the ori
