单项选择题

The direct reason for specialization is ______.

A．the development in communication
B．the growth of professionalisation
C．the expansion of scientific knowledge
D．the splitting up of academic societies

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单项选择题The author writes the development of geology to demonstrate ______.

A．the process of specialization and professionalisation
B．the hardship of amateurs in scientific study
C．the change of policies in scientific publications
D．the discrimination of professionals against amateurs

单项选择题We can infer from the passage that ______.

A．there is little distinction between specialization and professionalisation
B．amateurs can compete with professionals in some areas of science
C．professionals tend to welcome amateurs into the scientific community
D．amateurs have national academic societies but no local ones