单项选择题

Which of the following had the title "the Wizard of Menlo Park"

A．Thomas Alva Edison.
B．John Stevens.
C．Charlie Chaplin.
D．Robert Fulton.
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单项选择题
In the writer's opinion, interdisciplinary studies are important because they ______.
A．encourage scholars to concentrate on their own specialisations
B．allow scholars to change disciplines more easily
C．make scholars aware of problems outside their own field
D．allow overworked scholars to relax
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．textbooks have wide circulation
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