人教版选修8:Unit 3 Inventors and inventions reading and some languange points(共51张PPT)
人教版选修8:Unit 3 Inventors and inventions reading and some languange points(共51张PPT)第3页

 Finding a problem Doing research 3. Thinking of a creative solution 4. Testing the solution 5. Deciding on the invention 6. Applying for a patent

The stages every inventor must go through