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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. there are so many people working in similar fields
B. there is a lot of social unrest at universities
C. their follow experts are scattered round the world
D. their laboratories are in remote places
单项选择题
When did the U.N. come into existence().

A. 26 June, 1945.
B. 24 October, 1945.
C. New Year’s Day in 1945.
D. April, 1945.
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