56,D (He was Prince Henry of Portugal)
57,B (Henry's goal was to design and equip vessels that would be capable of making long ocean voyages )
58,B (Jewish astronomers, Italian and Spanish Sailors, and Arab mathematicians and map makers )
59,A (Henry's goal was to design and equip vessels that would be capable of making long ocean voyages )
60,B 主要讲的是Prince Henry .