工程常用的投影法分为两类 和 ,其中正投影法属于 投影法。 2 、在工程技术中为了准确地表达机械、仪器、建筑物等物的形状、结构和大小,根据投影原理标准或有关规定画出的图形,叫做
The University of Oxford was founded in the 8th century.()
Introduce university of Oxford according to the text 5. 建校时间 The college was founded in _______________ by ______________.
University of Oxford was founded in the 1 0 th century.()