Realization function: (1) can open and save the picture. (2) can realize drawing graphics (straight line, hollow (Shi Xin) ellipse, hollow (Shi Xin) rectangle, polygon); polygons mainly include triangles, quadrangles, pentagons, hexagons. (3) to change the thickness of the brush. (4) to change the color of the brush. (5) you can use the mouse to drag and move the sketches on the drawing board. (6) rubber erase function and full screen scavenging function.

Filename	Size	Update
ppt.ppt	306688	2016-07-08
附件.doc	304640	2016-07-08

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