In the 19^th century there was an exhibition on the fine art in Paris£®Before it was open to the public£¬several well£­known artists were invited and show their opinions£®There was a curtain covering each painting£®When they came near the first painting£¬an assistant drew the curtain away£®A beautiful butterfly flew into the hall and stopped on one of the roses in the picture£®All of them cheered£®They all declared that it was excellent because it confused the butterfly£®

Then they came to the second painting£®When the assistant was going to draw the curtain£¬he cried£¬“Wonderful£¡It’s the best painting I have ever seen!”