The 2010 Shanghai World Expo is an unprecedented event, with more than 200 national pavilions and enterprise theme pavilions  College student Wang Gang decided to visit the World Expo on the second day of his summer vacation  The night before last, he specially went online to check the netizens' suggestions on the selection of relevant popular venues  Among them, three attracted Wang Gang most: (1) if you visit the Saudi Arabia Pavilion, you won't visit the Oil Pavilion  (2) The Petroleum Museum and the China National Pavilion are optional  (3) Not both the China National Pavilion and the Petroleum Museum  In fact, Wang Gang had a very tight schedule for the World Expo the next day
He did not accept any of the above three suggestions
Visit Saudi Arabia Pavilion and petroleum Pavilion, but not China National Pavilion