How long has it been since people started to use lacquer in China?
A. 5000 years
B. nearly 10,000 years
C. 2000 years
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What’s the color of the raw lacquer when it first comes out from Rhus?
A. white
B. brown
C. black
一物体的三视图上长度标注为2000,其比例为1﹕5,则其实际大小为( )
A. 400
B. 2000
C. 10000
D. 200
在PowerPoint中,视频或音频文件如果没有进行设置在放映时也会自动播放。
在PowerPoint中,从当前幻灯片开始放映的快捷键是Shift+F5。