E
　　　Scholars and students have always been great travelers. The official case for “academic mobility” is now often stated in impressive terms as a fundamental necessity for economic and social progress in the world, and debated in the areas of Europe, but it is certainly nothing new. Serious students were always ready to go abroad in search of the best teachers and the most famous academies; in search of the purest philosophy, the most effective medicine, the likeliest road to gold
　　Mobility of this kind meant also mobility of ideas, their moving across borders, their simultaneous  (同时发生的)impact upon many groups of people. The point of learning is to share it, whether with students or with colleagues; one thinks that only eccentrics have no interest in being credited(相信) with a striking discovery, or a new technique. It must also have been comforting to know that other people in other parts of the world were about to make the same discovery or were thinking along the same lines, and that one was not quite alone, faced by question, ridicule or neglect.
　　In the twentieth century, and particularly in the last 20 years, the old footpaths of the wandering scholars have become vast highways. The vehicle which has made this possible has of course been the aeroplane, making contact between scholars even in the most distant places immediately available, and providing for the very rapid transmission of knowledge.
　　Apart from the vehicle itself, it is fairly easy to identify the main factors which have brought about the recent explosion in academic movement. Some of these are purely quantitative and require no further mention: there are far more centres of learning, and a far greater number of scholars and students.
　　In addition one must recognize the very considerable increase of all kinds of subjects, particularly in the sciences, which by widening the total area of advanced studies has produced an enormous number of specialists whose particular interests are precisely defined. These people would work in some isolation if they were not able to keep in touch with similar isolated groups in other countries.
71.It can be concluded from the passage that"academic mobility"_____.
A.means the friendship formed by scholars on the trip
B.is a program carried out by governments
C.has been put great emphasis on in the world
D.means going abroad in search of the best teachers
72.The word "eccentric" underlined in the second paragraph most probably means_____.
A.a rather strange person                              B.a person of no exceptional ability
C.an ambitious person                                  D.peculiar or unusual
73.In the eyes of the author,what happens to a scholar who shares his ideas with his      
colleagues?
A.He risks his ideas being stolen.                   B.He gains recognition for his achievement
C.He is considered as an eccentric.                 D.He is credited with a striking discovery.
74.According to the passage,the recent growth in air travel has meant that_____.
A.travel around the world becomes realistic and affordable
B.more students from remote areas can attend universities
C.all kinds of information can be shared by more people
D.scholars can meet each other more easily
75.The author thinks that it's important for scholars to be able to travel because_____.
A.their laboratories are in remote places
B.there is too much stress at universities
C.their fellow experts are spread across the world
D.there are so many people working in similar fields