在我国，大多数学者倾向于根据生产方法和植物学分类将烟草分为烤烟、晒烟、晾烟、电子烟、白肋烟、香料烟、黄花烟
A、正确
B、错误

不定项选择光纤是利用光的折射原理工作的，光纤由纤芯和包层构成，且纤芯的折射率小于包层的折射率。

单项选择题The architecture of the Yuan Dynasty boldly increase the use of wooden frame structure, and the architectural characteristics of this time were extensive and uninhibited. Because the Mongolians love white, the Yuan Dynasty buildings mostly use white glazed tiles.( )