题目

Listed here are four of the thousands of impressive museums around the world. The Guggenheim Museum Bilbao in Bilbao, Spain Built in 1997, the Guggenheim Museum Bilbao is one of the newest in the world. It has transformed the industrial city of Bilbao into a travelers' desired destination. The beautiful architecture of the museum has provided a dramatic background for movies and commercials. The Louvre in Paris, France Probably the most famous Louvre also holds the most famous painting in the world, the  Mona Lisa by Leonardo da Vinci. Crowds can be found any day surrounding the small1．一幅宣传画的长为acm，宽为bcm，把它粘在一块长方形木板上，四周刚好留出2cm宽的边框，则这块木板的面积是（ab+4a+4b+16）cm2．