单项选择题

Judging by the passage, biologist David Anderson ______.

A．seemed to be interested in marathon
B．made use of a satellite in his research
C．was probably a specialist in remote education
D．put together multimedia presentations for NSF

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单项选择题

Which of the following is not mentioned as an international organization that supports the project

A．United Nations Children’s Fund
B．The World Health Organization
C．International Science Institute
D．International Children’s Foundation

单项选择题

What is common to relational terms and deictic expressions

A．They both require a considerable exercise of intelligence.
B．They both involve the concept of size in referring to objects.
C．They can both be used to test the intelligence of children.
D．They pose difficulties for young children in acquisition of language.