Sketching is the foundation, or skeleton, of painting.翻译:__________________________________________________。
Sketches are most often in black or white, but if you add light colors, people can think of them as sketches as well.翻译:________________________________________________________________________________________。
The sketching level of an artist is one of the indicators that reflects the ability to paint in this space.翻译:__________________________________________________________________________。
金属材料的使用性能一般包括下列()哪三种。
A. 力学性能
B. 物理性能
C. 化学性能
D. 工艺性能
E. 铸造性能