单项选择题

The writer thinks that the growth of specialist societies and periodicals had helped scholars to ______.

A．cut down research costs
B．keep up with current developments
C．spend less time travelling
D．develop their ideas more quickly
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单项选择题
The writer claims that it is important for specialists to be able to travel because ______.
A．their fellow experts are scattered around the world
B．their laboratories are in remote places
C．there are so many people working in similar fields
D．text books have wide circulation
单项选择题
What, in the writer's opinion, happens to a scholar who shares his ideas with his colleagues
A．He gains recognition for his achievements.
B．He attracts large numbers of students.
C．He risks his ideas being student.
D．He is considered slightly mad.
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