@remus said:

Sounds like it could be a grphics problem.

As a temporary measure, try going window->preferences->openGL and turn off hardware acceleration.

Thanks remus, your help is working! 👍
Sorry for can not response quickly, got internet connection problem here

THANKS

IMHO, videos are a great way to start.
Here's the official SketchUp channel on Youtube:
http://www.youtube.com/user/sketchupvideo?blend=3&ob=4