material
蓝宝石 : 材料、制造、应用 : material, manufacturing, applications.pdf
本书首先介绍了蓝宝石在珠宝工业、工程、光学领域和医学中的应用；然后依次针对蓝宝石的物理和化学方面的基本性能和表面变化及体变化方面的辐照效应展开讨论；接下来重点阐述了单晶的生长方法及蓝宝石单晶生长过程中结构缺陷形成的规律；最后介绍了蓝宝石的后期化学机械加工处理、热处理及蓝宝石单晶的
It was the color of the material _____ he was surprised at.
It was the color of the material \_\_\_\__ he was surprised at.
Passage 2 For the past two years, I have been working on students’ evaluation of classroom teaching. I have kept a record of informal conversation (1)_____ some 300 students from at (2)_____ twenty-one colleges and universities. The students were
Passage 2 For the past two years, I have been working on students’ evaluation of classroom teaching. I have kept a record of informal conversation (1)\_\_\_\__ some 300 students from at (2)\_\_\_\__
The kind of material ________ with the temperature increasing.
The kind of material ________ with the temperature increasing.A